HOUSTON — HOUSTON (AP) — A burst of gunfire at an 18-year-old girl's birthday party Saturday night left two dead, another two critically injured and dozens hurt in a chaotic scene where people jumped from second-floor windows to escape the shooting at a suburban Houston home.

More than 100 people, mostly 17- to 19-year-olds, had gathered at the home in Cypress, the Harris County Sheriff's Office said. Partygoer Shaniqua Brown told The Associated Press it "was not rowdy at all," and many people were dancing when they heard the shots, which police said were fired between 11:30 p.m. and midnight.

Authorities say they're seeking two gunmen.

A man and woman died — one at the scene and another at a hospital. They have not been identified by name. As many as 22 were hurt, with injuries ranging from gunshot wounds to twisted ankles by those fleeing in panic. Sheriff's spokesman Thomas Gilliland said Sunday authorities are still trying to determine the condition for many of the injured.

He said deputies were confronted with "mass chaos" when they responded to the call in this residential neighborhood about 25 miles northwest of Houston, adding that "kids were literally everywhere." He said witnesses reported partygoers jumping from the second floor in their scramble to flee.

Mariah Boulden told the Houston Chronicle it was her birthday party. She said her brother and others were patting down people as they entered her home. Two men refused to be searched and walked away, she told the newspaper, then apparently hopped a neighbor's fence and entered through a back gate.

"They wasn't supposed to be here whoever they was," Boulden said.

Brown said gunshots began in the house and continued outside as people ran into the streets seeking cover. She told the AP she saw one gunman when she ran outside to escape.

Pools of blood were visible outside the two-story brick home Sunday, and the garage door was bent after people had pushed it upward while trying to escape.

Karen Briones was visiting relatives in the neighborhood, which is about 25 miles northwest of downtown Houston.

"Girls were crying and screaming, banging on people's doors asking them for help and to call 911," she told the newspaper.

The sheriff's statement said those hurt were taken to at least five area medical centers or hospitals, some by paramedics and some in private vehicles. Gilliland said some people were shot in the foot, ankle and hip.

Sheriff's Office spokeswoman Christina Garza told the Chronicle that at least one parent was in the house. Gilliland said investigators were trying to determine if alcohol had been served at the party.

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    Defense contract employee and former Navy reservist Aaron Alexis, 34, allegedly opened fire shortly after 8 a.m. inside building 197 in the Washington Navy Yard, <a href="http://www.huffingtonpost.com/2013/09/17/washington-navy-yard-shooting-victims_n_3940206.html" target="_hplink">killing 12 people and wounding more than a dozen others</a>. Alexis was slain in a gun battle with police.

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  • July 26, 2013 - Hialeah, Fla. - 7 dead

    Police say Pedro Vargas, 42, went on a shooting spree in his South Florida apartment complex, <a href="http://www.huffingtonpost.com/2013/07/31/hialeah-shooting_n_3683750.html" target="_hplink">killing the building's two managers, a family of three, and a man returning from his son's boxing practice</a>. Before the attack, Vargas called the police asking the dispatcher to run the license plate of a vehicle parked outside the building, after reporting he had been followed and threatened by people doing witchcraft. Vargas was killed by a SWAT team after an eight-hour stand-off with police, during which he took two people hostage. The hostages were rescued when the SWAT team stormed the apartment.

  • July 26, 2013 - Clarksburg, W. Va. - 4 dead

    Sidney Muller, 27, was arrested on four counts of first-degree murder for allegedly <a href="http://www.huffingtonpost.com/2013/07/26/sidney-muller_n_3661185.html" target="_hplink">killing two individuals after a drug deal gone wrong</a>. Muller allegedly then turned his weapon on two passersby, a father and his son who were delivering the local newspaper, killing them.

  • June 7, 2013 - Santa Monica, Calif. - 5 dead (including gunman)

    Police say John Zawahri, 23, armed with a homemade assault rifle and high-capacity magazines, <a href="http://www.huffingtonpost.com/2013/06/09/john-zawahri-santa-monica_n_3409649.html" target="_hplink">killed his brother and father at their home</a> and then headed to Santa Monica College, where he carjacked a woman, ordering her to drive him around while he fired at other people. The woman escaped unharmed but <a href="http://www.huffingtonpost.com/2013/06/09/john-zawahri-santa-monica_n_3409649.html" target="_hplink">two other people were gunned down</a>. Zawahri was confronted by police outside the school's library. They traded fire and police officers ultimately shot him dead.

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    Jeremiah Bean, 25, was arrested days after allegedly <a href="http://www.huffingtonpost.com/2013/05/18/jeremiah-bean-charged_n_3298786.html" target="_hplink">killing an elderly couple in their home, then a newspaper delivery man and another couple nearby</a>. Police say the first attack went undetected, giving Bean the opportunity to commit the three others. He was arraigned on 19 counts, including first-degree murder, arson and burglary.

  • April 24, 2013 - Manchester, Ill. - 5 dead

    Rick Odell Smith, 43, allegedly stormed a <a href="http://www.huffingtonpost.com/2013/04/25/illinois-family-shot_n_3157658.html" target="_hplink">home, killing five members of the same family</a>. Smith had been in a dispute with at least one of the victims, potentially over the custody of a child, police said. The five victims included <a href="http://www.huffingtonpost.com/2013/04/24/manchester-illinois-shoot-5-dead_n_3146686.html" target="_hplink">a grandmother, her granddaughter, the granddaughter's boyfriend and their two children</a>

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  • March 13, 2013 - Herkimer County, N.Y. - 4 dead

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  • Jan. 19, 2013 - Albuquerque, N.M. - 5 dead

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