Emergency vehicles filled the Clackmas Town Center south of Portland, Ore., after a masked gunman wearing camouflage opened fire Dec. 11 in a busy mall, leaving the gunman and two others dead.

Police: Gunman had no connection to the two people he fatally shot.

A law enforcement official secured the scene after the shooting.

A police officer conducted interviews with patrons outside the mall.

Witnesses said the scene went from cheery to chaotic in seconds when a gunman opened fire in the suburban Portland shopping mall Tuesday, killing two people and wounding another.

Macy's employees were staged across the street from the mall.

Mall workers and shoppers waited to be cleared to leave REI.

Law enforcement personnel worked the scene of a shooting at the Clackamas Town Center.

A tactical team moved through the mall parking lot.

Police exit the Clackamas Town Center shopping mall in Portland, Ore., where a gunman opened firein the middle of the busy Christmas season, killing at least two people, critically wounding a young woman and terrorizing holiday shoppers before shooting himself to death, police said.

Law enforcement personnel worked the scene of the shooting.

Onlookers observed the scene outside the shopping mall.

Police and medics outside the scene of the multiple shooting at Clackamas Town Center Mall.

Police officers surveyed the scene outside the mall.

A still image taken from video on KATU-TV shows first responders at the Clackamas Town Center in Portland, Ore., on Dec. 11.

An Oregon State Police car left the parking lot of the mall.

A couple removed police tape from their car after they were cleared to leave Clackamas Town Center.

Clackamas County Sheriff’s Sergeant Adam Phillips spoke during a news conference outside the Clackamas Town Center in Portland, Ore.