Residents who live in the same apartment complex as suspected shooter James Holmes were still not allowed to return home as they expected on Tuesday since police said the investigation is not quite wrapped up yet.

More than 30 homemade grenades, 10 gallons of gasoline, improvised explosive devices (IED's) and trip wires or trigger mechanisms have been secured from the apartment.

An unnamed law enforcement official told CNN that grenades were wired to a control box in the kitchen, resembling setups that are more often seen in Iraq and Afghanistan. The official added that had the explosives gone off as intended, they likely would have knocked down the walls of nearby apartments.

Dateline's Chris Hansen reportedly got a peek inside and described what he saw with NBC viewers, remarking that the explosives were sophisticated enough to take the building down.

In the middle of his living room are dozens of black softball shaped firework shells that he bought filled with explosive power. They are all over the place. In the middle there are two jars full of liquid wires as I said all over the place there was a black box with a red blinking light. A mechanical camera then pans over on top of a glass table -- you see this water cooler jug half full of bullet. Then you pan down, then you see this black box with another red blinking light. The camera goes over, there are two chairs one has a jar apparently with fluid. The other has another black box and then there are green soda pop bottles filled with fluid all the way around.

If the gasoline had been ignited, it would have created a deadly domino effect rigged to the opening of the front door.

Steven Foster, an International Security Expert and former officer with the Aurora Police Department told the Daily Beast that he suspects Holmes' plan was to create a diversion.

“This is a classic military tactic,” says Foster. “You create a diversion, and during the confusion you can have a higher level of impact in wounding people.”

Police are still not saying what chemicals were found in Holmes' apartment and Holmes is reportedly still not cooperating.

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  • Colorado Community Mourns In Aftermath Of Deadly Movie Theater Shooting

    AURORA, CO - JULY 24: A Federal Bureau of Investigation agent takes photos as he investigates inside the apartment building where suspect James Holmes lived July 24, 2012 in Aurora, Colorado. Holmes, 24, is accused of killing 12 people and injuring 58 in a shooting spree on July 20 during a screening of 'The Dark Knight Rises.' According to police Holmes' apartment had more than 30 homemade grenades and 10 gallons of gas inside that was booby-trapped to go off. (Photo by Joshua Lott/Getty Images)

  • Colorado Community Mourns In Aftermath Of Deadly Movie Theater Shooting

    AURORA, CO - JULY 24: A Federal Bureau of Investigation agent takes photos as he investigates inside the apartment where suspect James Holmes lived July 24, 2012 in Aurora, Colorado. Holmes, 24, is accused of killing 12 people and injuring 58 in a shooting spree on July 20 during a screening of 'The Dark Knight Rises.' According to police Holmes' apartment had more than 30 homemade grenades and 10 gallons of gas inside that was booby-trapped to go off. (Photo by Joshua Lott/Getty Images)

  • Colorado Community Mourns In Aftermath Of Deadly Movie Theater Shooting

    AURORA, CO - JULY 24: Yellow crime scene tape surrounds the apartment building where suspect James Holmes lived July 24, 2012 in Aurora, Colorado. Holmes, 24, is accused of killing 12 people and injuring 58 in a shooting spree on July 20 during a screening of 'The Dark Knight Rises.' According to police Holmes' apartment had more than 30 homemade grenades and 10 gallons of gas inside that was booby-trapped to go off. (Photo by Joshua Lott/Getty Images)

  • Colorado Community Mourns In Aftermath Of Deadly Movie Theater Shooting

    AURORA, CO - JULY 21: Aurora Police Department motorcycles escort a dump truck filled with sand and improvised explosive devices removed from James Holmes' apartment July 21, 2012 in Aurora, Colorado. According to police in Aurora, a suburb of Denver, Holmes, 24, is in custody and is suspected of killing 12 people and injuring 59 during a screening of 'The Dark Knight Rises.' Holmes left his apartment filled with 30 various devices and trip wires ment to kill or hurt anyone entering. (Photo by Chip Somodevilla/Getty Images)

  • Colorado Community Mourns In Aftermath Of Deadly Movie Theater Shooting

    AURORA, CO - JULY 21: Seen from the air, police and fire fighters surround the booby-trapped apartment of suspect James Holmes after he went on a shooting rampage at nearby Century 16 movie theatre during an early morning screening of the new Batman movie, 'The Dark Knight Rises,' on July 21, 2012 in Aurora, Colorado. According to reports, 12 people have been killed and over 59 injured including 9 in critical condition. Police have the suspect, twenty-four year old James Holmes of North Aurora, in custody. (Photo by Kevork Djansezian/Getty Images)

  • Colorado Community Mourns In Aftermath Of Deadly Movie Theater Shooting

    AURORA, CO - JULY 21: Seen from the air, police and fire fighters have their morning meeting as they surround the booby-trapped apartment of suspect James Holmes after he went on a shooting rampage at nearby Century 16 movie theatre during an early morning screening of the new Batman movie, 'The Dark Knight Rises,' on July 21, 2012 in Aurora, Colorado. According to reports, 12 people have been killed and over 59 injured including 9 in critical condition. Police have the suspect, twenty-four year old James Holmes of North Aurora, in custody. (Photo by Kevork Djansezian/Getty Images)

  • A member of the prosecution team is seen inside the apartment where accused killer James Homes lived, Tuesday, July 24, 2012 in Aurora, Colo. Twelve people were killed and over 50 wounded in a shooting attack early Friday at the packed theater during a showing of the Batman movie, "The Dark Knight Rises." Police have identified the suspected shooter as James Holmes, 24. (AP Photo/Alex Brandon)

  • Chuck Mehl

    Aurora Police Detective Chuck Mehl, of the Major Crime/Homicide Unit and a member of the prosecution team, is seen inside the apartment where accused killer James Homes lived, Tuesday, July 24, 2012 in Aurora, Colo. Twelve people were killed and over 50 wounded in a shooting attack early Friday at the packed theater during a showing of the Batman movie, "The Dark Knight Rises." Police have identified the suspected shooter as James Holmes, 24. (AP Photo/Alex Brandon)

  • A member of the prosecution team is seen inside the apartment where accused killer James Homes lived, Tuesday, July 24, 2012 in Aurora, Colo. Twelve people were killed and over 50 wounded in a shooting attack early Friday at the packed theater during a showing of the Batman movie, "The Dark Knight Rises." Police have identified the suspected shooter as James Holmes, 24. (AP Photo/Alex Brandon)

  • A member of the prosecution team is seen inside the apartment where accused killer James Homes lived, Tuesday, July 24, 2012 in Aurora, Colo. Twelve people were killed and over 50 wounded in a shooting attack early Friday at the packed theater during a showing of the Batman movie, "The Dark Knight Rises." Police have identified the suspected shooter as James Holmes, 24. (AP Photo/Alex Brandon)

  • A poster on the wall is seen inside the apartment where accused killer James Homes lived, Tuesday, July 24, 2012 in Aurora, Colo. Twelve people were killed and over 50 wounded in a shooting attack early Friday at the packed theater during a showing of the Batman movie, "The Dark Knight Rises." Police have identified the suspected shooter as James Holmes, 24. (AP Photo/Alex Brandon)

  • A candle sits on the table inside the apartment where accused killer James Homes lived, Tuesday, July 24, 2012 in Aurora, Colo. Twelve people were killed and over 50 wounded in a shooting attack early Friday at a packed movie theater during a showing of the Batman movie, "The Dark Knight Rises." Police have identified the suspected shooter as James Holmes, 24. (AP Photo/Alex Brandon)

  • Books sit on the shelves inside the apartment where accused killer James Homes lived, Tuesday, July 24, 2012 in Aurora, Colo. Twelve people were killed and over 50 wounded in a shooting attack early Friday at a packed movie theater during a showing of the Batman movie, "The Dark Knight Rises." Police have identified the suspected shooter as James Holmes, 24. (AP Photo/Alex Brandon)

  • Members of federal law enforcement load their car outside the apartment where accused killer James Homes lived, Tuesday, July 24, 2012 in Aurora, Colo. Twelve people were killed and over 50 wounded in a shooting attack early Friday at a packed movie theater during a showing of the Batman movie, "The Dark Knight Rises." Police have identified the suspected shooter as James Holmes, 24. (AP Photo/Alex Brandon)

  • Dimitry Shchekochikhin

    University of Colorado medical school researcher Dimitry Shchekochikhin, from Moscow, leaves after getting his computer and some clothes from his apartment in the same building of shooting suspect James Eagen Holmes in Aurora, Colo., Sunday, July 22, 2012. Shchekochikhin, 27, says he lived in the apartment house since November and had casual contact with Holmes. Holmes has been charged in the shooting at an Aurora theatre early Friday that killed twelve people and injured more than 50. (AP Photo/Ed Andrieski)

  • Dimitry Shchekochikhin

    University of Colorado medical school researcher Dimitry Shchekochikhin, left, from Moscow, thanks Aurora police officers after they recovered his computer and some clothes from his apartment at the same apartment house of shooting suspect James Eagen Holmes in Aurora, Colo. on Sunday, July 22, 2012. Shchekochikhin, 27, says he lived in the apartment house since November and had casual contact with Holmes. Holmes has been charged in the shooting at an Aurora theatre early Friday that killed twelve people and injured more than 50. (AP Photo/Ed Andrieski)

  • Investigators remove computer equipment as evidence from the apartment of alleged gunman James Holmes, Saturday, July 21, 2012 in Aurora, Colo. Authorities reported that 12 died and more than three dozen people were shot during an assault at a movie theatre midnight premiere of "The Dark Knight Rises." (AP Photo/Alex Brandon)

  • Evidence removed from the apartment of alleged gunman James Holmes, lines the hallway outside his apartment, Saturday, July 21, 2012 in Aurora, Colo. Authorities reported that 12 died and more than three dozen people were shot during an assault at a movie theatre midnight premiere of "The Dark Knight Rises." (AP Photo/Alex Brandon)

  • Evidence is removed by investigators from the apartment of alleged gunman James Holmes, Saturday, July 21, 2012 in Aurora, Colo. Authorities reported that 12 died and more than three dozen people were shot during an assault at a movie theatre midnight premiere of "The Dark Knight Rises." (AP Photo/Alex Brandon)

  • An investigator removes a computer hard drive as evidence from the apartment of alleged gunman James Holmes, Saturday, July 21, 2012 in Aurora, Colo. Authorities reported that 12 died and more than three dozen people were shot during an assault at a movie theatre midnight premiere of "The Dark Knight Rises." (AP Photo/Alex Brandon)

  • Investigators remove evidence from the apartment of alleged gunman James Holmes, Saturday, July 21, 2012 in Aurora, Colo. Authorities reported that 12 died and more than three dozen people were shot during an assault at a movie theatre midnight premiere of "The Dark Knight Rises." (AP Photo/Alex Brandon)

  • Members of law enforcement wearing body armor and helmets prepare to what ATF sources describe as a"water shot" in the apartment of alleged gunman James Holmes Saturday, July 21, 2012 in Aurora , Colo. The "water shot" is exploded and used to disrupt the device. Authorities reported that 12 died and more than three dozen people were shot during an assault at a movie theatre midnight premiere of "The Dark Knight Rises." (AP Photo/Alex Brandon)

  • An ATF agent and FBI agents measure the poster titled "Soldiers of Misfortune" in the bedroom in the apartment of alleged gunman James Holmes, Saturday, July 21, 2012 in Aurora, Colo. Authorities reported that 12 died and more than three dozen people were shot during an assault at a movie theatre midnight premiere of "The Dark Knight Rises." (AP Photo/Alex Brandon)

  • What is believed to be the kitchen in the apartment of alleged gunman James Holmes, is seen Saturday, July 21, 2012 in Aurora, Colo. Authorities reported that 12 died and more than three dozen people were shot during an assault at a movie theatre midnight premiere of "The Dark Knight Rises." (AP Photo/Alex Brandon)

  • FBI agents photograph the bedroom in the apartment of alleged gunman James Holmes with a poster titled "Soldiers of Misfortune" Saturday, July 21, 2012 in Aurora, Colo. Authorities reported that 12 died and more than three dozen people were shot during an assault at a movie theatre midnight premiere of "The Dark Knight Rises." (AP Photo/Alex Brandon)

  • FBI agents investigate in the bedroom in the apartment of alleged gunman James Holmes with a poster titled "Soldiers of Misfortune" Saturday, July 21, 2012 in Aurora, Colo. Authorities reported that 12 died and more than three dozen people were shot during an assault at a movie theatre midnight premiere of "The Dark Knight Rises." (AP Photo/Alex Brandon)

  • An Aurora police officer pulls down the crime scene tape allowing most residents back to their homes that are near the apartment of alleged gunman James Holmes, Saturday, July 21, 2012 in Aurora, Colo. Authorities reported that 12 died and more than three dozen people were shot during an assault at a movie theatre midnight premiere of "The Dark Knight Rises." (AP Photo/Alex Brandon)

  • A dump truck with sand and the explosives from the apartment of alleged gunman James Holmes leaves for a disposal site with a police escort Saturday, July 21, 2012 in Aurora , Colo. Authorities reported that 12 died and more than three dozen people were shot during an assault at a movie theatre midnight premiere of "The Dark Knight Rises." (AP Photo/Alex Brandon)