11:45 a.m. CDT
FBI agents in Phoenix are now looking at a second vehicle parked at the complex apartment where a unit is being searched as part of the investigation into a shooting outside a Prophet Muhammad cartoon contest.
Agents had broken into a white minivan and spent hours looking at it, taking pictures and removing items. They're also are examining and photographing pages of a notebook or papers in the trunk of a second vehicle, a silver sedan. The sedan is parked in a covered spot near the building where the apartment is located.
Meanwhile, other FBI agents are knocking on the doors of other apartments to interview residents as Phoenix Police Department bomb squad members wearing protective armor and helmets continue to go in and out of the apartment being searched.
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11:10 a.m. CDT
A White House spokesman says the president has been informed about the shooting outside a contest for Prophet Muhammad cartoons in suburban Dallas and believes no act of expression justifies violence.
Spokesman Josh Earnest says extremists try to use expressions they consider to be offensive as a way to justify violence around the world.
Earnest says "there is no act of expression, even if it's offensive, that justifies an act of violence."
Earnest also praised the officers who responded to the Sunday night shooting, saying "we saw a pretty important and notable display of bravery on the part of first responders."
The two gunmen, armed with assault rifles, were killed after opening fire on officers outside the event. One security guard was wounded.
Earnest credits officers' courage for the incident not resulting in more injuries or deaths.
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11 a.m. CDT
An Arizona man identified by a federal law enforcement official as one of the gunmen who opened fired outside a Prophet Muhammad cartoon contest in Texas has the same name as a man convicted in Arizona of lying to the FBI during a terrorism investigation.
Court documents show that a man named Elton Simpson was convicted in Phoenix of lying to the FBI in January 2010, about whether he'd discussed traveling to Somalia. According to trial testimony, Simpson is an American Muslim who became the subject of a criminal investigation in 2006 because of his association "with an individual whom the FBI believed was attempting to set up a terrorist cell in Arizona."
Simpson was convicted, but a judge ruled that prosecutors hadn't proven the false statement involved terrorism. Simpson was later sentenced to three years of probation.
A federal law enforcement official says one of two gunmen killed at the Texas event late Sunday also was named Elton Simpson. Investigators were searching Simpson's property in Phoenix in connection with the case, according to the official, who was not authorized to discuss an ongoing investigation by name and spoke to The Associated Press on the condition of anonymity.
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10:30 a.m. CDT
Texas police say the officer who fatally shot two gunmen who opened fire outside a contest for Prophet Muhammad cartoons likely saved lives.
Garland Police Officer Joe Harn didn't release the name of the officer, but says "his reaction, and his shooting with a pistol, he did a good job."
Harn says officers were able to stop the two gunmen before they were able to get inside the suburban Dallas venue hosting the event and shoot anyone else.
A security guard was shot and wounded during the incident Sunday night.
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10:20 a.m. CDT
A federal law enforcement official has identified one of the suspects in the shooting outside a contest for Prophet Muhammad cartoons as Elton Simpson.
The official, who was not authorized to discuss an ongoing investigation by name and spoke to The Associated Press on the condition of anonymity, said investigators were searching Simpson's property in Phoenix, Arizona, in connection with the case.
Investigators believe Simpson is one of two gunmen who opened fire Sunday night outside the suburban Dallas venue hosting the contest.
Police officers shot and killed two gunmen who shot at a security officer outside the Curtis Culwell Center in Garland. The security officer was wounded in the shooting.
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10:15 a.m. CDT
Police in Garland, Texas, say two men had opened fire with assault rifles on officers outside a suburban Dallas venue hosting a provocative contest for Prophet Muhammad cartoons.
Officer Joe Harn said Monday the men, killed by security officers, also had more ammunition. He said investigators searched their vehicle and detonated several suspicious items, but no bombs were found in the vehicle.
He said luggage was found in vehicle but he wasn't sure what specifically was found amid the luggage
Harn said the officer shot in the lower leg was the only officer hurt.
He said a security plan for the event had been developed over several months.
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9:50 a.m. CDT
A resident of the Phoenix apartment complex where an apartment and a vehicle are being searched as part of the investigation into a Texas shooting is describing what he observed.
Douglas Hayes said he was watching a movie late Sunday night when noise outside prompted him to go out on his balcony, located right above where the vehicle was parked.
The 25-year-old says police cars flooded the complex and he saw SWAT team members throughout the complex.
Hayes said early Monday he heard a noise that turned out to be law enforcement personnel breaking into a parked white minivan. Hayes says the windows were broken, leaving glass scattered about.
Agents used a power saw to cut open the vehicle's back door. Hayes said agents processed the van for hours afterward.
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9:30 a.m. CDT
FBI agents are searching an apartment and a vehicle at a Phoenix apartment complex as part of the investigation into the deadly shooting outside a suburban Dallas venue hosting a provocative contest for Prophet Muhammad cartoons.
Agents wearing FBI jackets could be seen going in and out of an apartment and also searching a white Chevy minivan. They took what appeared to be plastic bottles out of the vehicle.
The apartment is on the first floor of a two-story building. The area around the building is sealed off but residents could be seen walking about and standing on their balconies observing the law enforcement presence.
News media helicopters are keeping an eye on the Autumn Ridge Apartments complex, which has several hundred apartments in multiple buildings.
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8:30 a.m. CDT
The FBI says agents are searching a Phoenix apartment as part of the investigation into the deadly shooting outside a suburban Dallas venue hosting a provocative contest for Prophet Muhammad cartoons.
FBI spokesman Perryn Collier on Monday confirmed the Phoenix residence is being searched for indications of what prompted the shooting Sunday that left two gunmen dead and a security officer wounded outside a center in Garland.
ABC News cites a senior FBI official in reporting that one of the gunmen, a resident of the Phoenix apartment, was known to authorities and was the subject of an investigation. The ABC report says the man was convicted five years ago of lying to federal agents about plans to travel to Africa, in an apparent attempt to join a terror group there.
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Associated Press reporter Eric Tucker in Washington, D.C., contributed to this report.
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