By AMY TAXIN and GILLIAN FLACCUS, Associated Press

ANAHEIM, Calif. -- Anaheim city officials have agreed to ask the U.S. attorney's office to investigate recent police shootings.

Tuesday's move comes amid raucous protests over two deadly police shootings over the weekend, including one of an unarmed man running from officers.

Police stepped up patrols and some donned riot gear outside the doors of City Hall's council chamber as hundreds demonstrated on the street.

The shooting of Manuel Diaz has sparked four nights of protests. On Saturday, angry demonstrators hurled rocks and bottles at officers who were securing the scene for investigators, and police responded by firing bean bags and pepper balls at the crowd.

The city council wants federal investigators to also look into police response to the protests.

THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below.

Dozens of protesters heckled police officers Tuesday as they denounced two deadly officer-involved shootings over the weekend, including one of an unarmed man who his family alleged was shot in the back of the head.

"Shame on you, you shot him nine times," the raucous crowd shouted as motorcycle officers rode by.

Police stepped up patrols and some donned riot gear outside the doors of City Hall's council chamber. The building was packed with people trying to get into the chamber, where the council was expected to discuss weekend shootings that have stoked anger over a spike in officer-involved shootings in the city.

Theresa Smith, whose son was killed on Dec. 11, 2009, by Anaheim police officers at a Walmart store, said she went by the scene of Saturday's shooting of 25-year-old Manuel Diaz and was astounded by what she saw.

"There were pieces of brain on the God darn grass, in front of all these children, in front of all these people," Smith said. "This traumatizes people and these people are angry."

On Tuesday, Diaz's family filed a civil rights lawsuit seeking $50 million in damages from the city of Anaheim and its police department, claiming he was wrongfully shot, said lawyer James Rumm.

The killing of Diaz and another man on Sunday have taken the tally of shootings by police officers to six so far this year in this Orange County city, up from four a year before, said police Sgt. Bob Dunn. Five of the incidents have been fatal.

Mayor Tom Tait said a description from court papers relayed to him by a reporter that Diaz had been shot in the leg and in the back of his head was "unsettling."

The Anaheim police union on Tuesday issued a statement defending the officers involved in the shootings and said both men killed were gang members who had criminal records.

The union also said that just before Diaz turned toward officers during Saturday's incident, he pulled an object from his waistband - a common place where gang members hide guns.

"I believe that the independent investigations by the Orange County District Attorney's Office into both incidents will show no wrongdoing by these officers," said Kerry Condon, the police association's president.

Anaheim is a city of contrasts that ranges from upscale, hilltop homes to packed, gritty apartment complexes. The city 25 miles southeast of Los Angeles is known as home to the Angels baseball team, and above all, to world-famous Disneyland.

As California's Hispanic population has grown, so has the city's, hitting nearly 53 percent in 2010, census figures show.

Residents' concerns about the use of police force in the Orange County city aren't new. Last month, Anaheim decided to look into hiring an independent investigator to review shootings by police amid protests by relatives of those killed in officers' gunfire.

But Latino activists say that isn't enough and want federal officials to probe the Saturday shooting of an unarmed man in broad daylight who police say was a gang member.

Benny Diaz, state director of the League of United Latin American Citizens in California, said he wants a citizen review commission to keep tabs on the police department, officers to undergo sensitivity training and federal officials to investigate.

"People are saying, `you know what? We have to stop this,'" said Diaz, adding that residents' past requests for a probe of officer shootings have gone nowhere. "As an organization we are trying to find peace but there comes a point where you have to stand up strong."

Tait, who has called for state and federal agencies to investigate the shooting, urged the community to remain calm and said he wanted to address any concerns in the Latino community.

"If the Latino community is saying there is a rift, then there is rift, and we need to address that," he said.

Diaz's death sparked three nights of protests. On Saturday, angry demonstrators hurled rocks and bottles at officers who were securing the scene for investigators, and police responded by firing bean bags and pepper balls at the crowd.

On Sunday, protesters swarmed police headquarters during a morning news conference and later set fire to a trash bin and pushed it into the street outside the apartment complex. On Monday night, Diaz's mother was joined by the relatives of others killed in police shootings in a march near where her son was shot.

Police Chief John Welter said Saturday's incident occurred after two officers approached three men who were acting suspiciously in an alleyway before running away. One of the officers chased Diaz to the front of the apartment complex.

The chief would not say what exactly led the officer to shoot Diaz. But he failed to heed police orders to stop and threw something on the roof of the complex that contained what officers believe to be heroin, Welter said.

Both officers were placed on paid leave pending an investigation.

The second shooting occurred Sunday when anti-gang officers spotted a suspected gang member in a stolen sport utility vehicle. A brief pursuit ended when three people jumped from the vehicle and ran. One suspect fired at an officer and the officer fired back, killing the gunman, who was identified as 21-year-old Joel Mathew Acevedo, authorities said.

Both incidents were under investigation by the county's district attorney office, which asked witnesses to come forward with information or video footage of Saturday's shooting.

The FBI is conducting a review to determine whether a civil rights investigation is warranted, said agency spokeswoman Laura Eimiller.

___

Associated Press video journalist Raquel Maria Dillon contributed to this report.

Earlier on HuffPost:

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  • Protests Continue In Anaheim Against The Police Department's Recent Shootings

    ANAHEIM, CA - JULY 29: A line of Orange County Police Officers block a freeway overpass leading to Disneyland during a protests to show outrage for the several recent officer involved shootings on July 29, 2012 in Anaheim, California. For the past week, protesters have clashed with police resulting in both property damage and many arrests. (Photo by Jonathan Gibby/Getty Images)

  • Protests Continue In Anaheim Against The Police Department's Recent Shootings

    ANAHEIM, CA - JULY 29: A line of Orange County Police Officers block a freeway overpass leading to Disneyland during a protest to show outrage for the several recent officer involved shootings on July 29, 2012 in Anaheim, California. For the past week, protesters have clashed with police resulting in both property damage and many arrests. (Photo by Jonathan Gibby/Getty Images)ges)

  • Police confront protestors at Harbor Boulevard and Ball Road in Anaheim, Calif. on Sunday, July 29, 2012. More than 300 demonstrators rallied Sunday to denounce two fatal police shootings and to issue a call for community peace. (AP Photo/The Orange County Register, Stuart Palley) MAGS OUT; LOS ANGELES TIMES OUT

  • Protests Continue In Anaheim Against The Police Department's Recent Shootings

    ANAHEIM, CA - JULY 29: An Orange County Police vehicle rushes ahead of protesters to block a freeway overpass leading to Disneyland during a protest to show outrage for the several recent office involved shooting at the on July 29, 2012 in Anaheim, California. For the past week, protesters have clashed with police resulting in both property damage and many arrests. (Photo by Jonathan Gibby/Getty Images)

  • Anaheim Protests

    Photo from Sunday, July 29 protests. 9 people were arrested.

  • Genevieve Huizar, Correna Chavez

    Genevieve Huizar, the mother of slain man Manuel Diaz, pleads for the violence to stop.

  • Correna Chavez, Genevieve Huizar

    Genevieve Huizar, third from left, the mother of Manuel Diaz, who was shot to death by Anaheim police, breaks down after pleading for a stop to the violence and says she doesn't want that to be her son's legacy after a news conference in Santa Ana, Calif., Wednesday, July 25, 2012. Far left is her daughter, Correna Chavez. Others are unidentified. Her news conference followed a fourth day of violent protests over Saturday's police shooting of Manuel Diaz and the Sunday death of another man. (AP Photo/Damian Dovarganes)

  • Protesters hit police cars as they drive by the intersection of Broadway and Anaheim Blvd Tuesday, July 24, 2012 as police attempt to regroup to put down the disturbance. Back-to-back weekend shootings by police have sparked four days of protests. (AP Photo/The Orange County Register,Paul Rodriguez )

  • Protesters yell at police near Anaheim City hall Tuesday, July 24, 2012 in Anaheim, Calif. Riot police fired bean bag rounds and pepper balls into a crowd of protestors outside City Hall protesting a police shooting. (AP Photo/The Orange County Register, Stuart Palley)

  • Anaheim Residents Protest Police Shootings Over Weekend

    ANAHEIM, CA - JULY 24: A protester sets fire to a sign after violence erupted between police officers and protesters during demonstrations to show outrage for the fatal shooting of Manuel Angel Diaz, 25, at Anaheim City Hall on July 24, 2012 in Anaheim, California. (Photo by Jonathan Gibby/Getty Images)

  • Anaheim Residents Protest Police Shootings Over Weekend

    ANAHEIM, CA - JULY 24: A protester is taken into custody during a demonstration to show outrage for the fatal shooting of Manuel Angel Diaz, 25, at Anaheim City Hall on July 24, 2012 in Anaheim, California. (Photo by Jonathan Gibby/Getty Images)

  • Anaheim Residents Protest Police Shootings Over Weekend

    ANAHEIM, CA - JULY 24: A protester is taken into custody during a demonstration to show outrage for the fatal shooting of Manuel Angel Diaz, 25, at Anaheim City Hall on July 24, 2012 in Anaheim, California. (Photo by Jonathan Gibby/Getty Images)

  • Anaheim Residents Protest Police Shootings Over Weekend

    ANAHEIM, CA - JULY 24: Police officers take a man into custody after he refused to disburse during a demonstration to show outrage for the fatal shooting of Manuel Angel Diaz, 25, at Anaheim City Hall on July 24, 2012 in Anaheim, California. (Photo by Jonathan Gibby/Getty Images)

  • Anaheim Residents Protest Police Shootings Over Weekend

    ANAHEIM, CA - JULY 25: Police officers stand guard after protesters set fire to a near by trash bin during a demonstration to show outrage for the fatal shooting of Manuel Angel Diaz, 25, at Anaheim City Hall on July 24, 2012 in Anaheim, California. Diaz was fatally shot on July 21 by an Anaheim police officer and has sparked days of protests by the angered community. (Photo by Jonathan Gibby/Getty Images)

  • Anaheim Residents Protest Police Shootings Over Weekend

    ANAHEIM, CA - JULY 25: A police officer stands guard after protesters set fire to a near by trash bin during a demonstration to show outrage for the fatal shooting of Manuel Angel Diaz, 25, at Anaheim City Hall on July 24, 2012 in Anaheim, California. (Photo by Jonathan Gibby/Getty Images)

  • Anaheim Residents Protest Police Shootings Over Weekend

    ANAHEIM, CA - JULY 24: Police officers take a man into custody after he refused to disburse during a demonstration to show outrage for the fatal shooting of Manuel Angel Diaz, 25, at Anaheim City Hall on July 24, 2012 in Anaheim, California. (Photo by Jonathan Gibby/Getty Images)

  • Anaheim Residents Protest Police Shootings Over Weekend

    ANAHEIM, CA - JULY 24: Vons employees clean broken glass from windows that were smashed by protesters after violence erupted between police officers and protesters during demonstrations to show outrage for the fatal shooting of Manuel Angel Diaz, 25, at Anaheim City Hall on July 24, 2012 in Anaheim, California. (Photo by Jonathan Gibby/Getty Images)

  • Demonstrators gathered on the steps of Anaheim City Hall Tuesday, July 24, 2012, to protest the death of Manuel Diaz, 25, who died as a result of gunshot wounds sustained during a police pursuit by the Anaheim Police Department last Saturday on North Anna Drive. (AP Photo/The Orange County Register,Stuart Palley )

  • Police wait at the entrance to city hall in Anaheim, Calif. Tuesday July 24, 2012 as demonstrators gathered on the steps to protest the death of Manuel Diaz, 25, who died as a result of gunshot wounds sustained during a police pursuit on Saturday. (AP Photo/The Orange County Register, Stuart Palley)

  • A group of Anaheim police officers try to hold back a crowd of protesters as they wait reinforcements Tuesday, July 24, 2012, in Anaheim, Calif. (AP Photo/The Orange County Register, Paul Rodriguez)

  • A protester screams at police blocking the doorway to Anaheim City Council Chambers Tuesday, July 24, 2012 in Anaheim, Calif. (AP Photo/The Orange County Register, Paul Rodriguez)

  • Demonstrators gather on the steps of Anaheim City Hall Tuesday, July 24, 2012, to protest the death of Manuel Diaz, 25, who died as a result of gunshot wounds sustained during a police pursuit by the Anaheim Police Department last Saturday. Riot police fired bean bag rounds and pepper balls into a crowd of protestors late Tuesday outside City Hall. (AP Photo/The Orange County Register,Stuart Palley)

  • A large crowd of protesters gathered at the intersection of Broadway and Anaheim Blvd. attempt to block police cars from passing on Tuesday, July 24, 2012 in Anaheim, Calif. (AP Photo/The Orange County Register,Paul Rodriguez)

  • Police take down a protester in the intersection of Broadway and Anaheim Blvd., in Anaheim Tuesday night July 25, 2012. (AP Photo/The Orange County Register)

  • Yesenia Rojas, 35, shows off a bruise, Sunday, July 22, 2012, in Anaheim, Calif., which she says was sustained by Anaheim Police after Manuel Diaz was allegedly shot by officers on Saturday. She said officers lost control of their dogs who attacked her son and one-year-old grandson. Diaz, an allegedly unarmed man, was shot by Anaheim Police on Saturday, The Orange County Register reports. (AP Photo/The Orange County Register, Mindy Schauer)

  • A woman shouts in front of a protest sign that says "Killer Cop Beware."

  • Lupe Diaz, right, sister of Manuel Diaz, gets a hug from Theresa Smith during a protest in front of the Anaheim Police Department, Sunday, July 22, 2012, in Anaheim, Calif. Manuel Diaz, an allegedly unarmed man, was shot by Anaheim Police on Saturday, The Orange County Register reports. Smith said her son was also killed by police two years ago. (AP Photo/The Orange County Register, Mindy Schauer)

  • Protesters confront a policeman over the fatal shooting of unarmed man Manuel Diaz.