TERROR

Investigation of deadly shooting outside Muhammad cartoon contest expands to Phoenix

  • A Texas state trooper stands guard at a parking lot near the Curtis Culwell Center where a provocative contest for cartoon depictions of the Prophet Muhammad was held Sunday, May 3, 2015, in Garland, Texas. The contest was put on lockdown Sunday night and attendees were being evacuated after authorities reported a shooting outside the building. (AP Photo/LM Otero)

    A Texas state trooper stands guard at a parking lot near the Curtis Culwell Center where a provocative contest for cartoon depictions of the Prophet Muhammad was held Sunday, May 3, 2015, in Garland, Texas. The contest was put on lockdown Sunday night and attendees were being evacuated after authorities reported a shooting outside the building. (AP Photo/LM Otero)  (The Associated Press)

  • FBI crime scene investigators document the area around two deceased gunmen and their vehicle outside the Curtis Culwell Center in Garland, Texas, Monday, May 4, 2015. Police shot and killed the men after they opened fire on a security officer outside the suburban Dallas venue, which was hosting provocative contest for Prophet Muhammad cartoons Sunday night. (AP Photo/Brandon Wade)

    FBI crime scene investigators document the area around two deceased gunmen and their vehicle outside the Curtis Culwell Center in Garland, Texas, Monday, May 4, 2015. Police shot and killed the men after they opened fire on a security officer outside the suburban Dallas venue, which was hosting provocative contest for Prophet Muhammad cartoons Sunday night. (AP Photo/Brandon Wade)  (The Associated Press)

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.