LOS ANGELES — A gunman armed with a high-powered rifle opened fire at Los Angeles International Airport Friday morning, killing a TSA agent and wounding several others.

Authorities said the gunman fired at several locations in Terminal 3 before police shot him.

The motive was unclear. A federal law enforcement official said that the gunman was a ticketed passenger entering the airport.

Officials don’t believe the gunman has ever worked for TSA. Law enforcement sources had earlier told the Los Angeles Times the gunman was a TSA employee.

Los Angeles Police Department anti-terrorism officials were on the scene, but sources said they don’t believe the suspect was tied to any known terrorist groups. They believe he acted alone.

At a press conference, the Los Angeles Fire Department treated seven people at the scene and transported six to hospitals.

Patrick Gannon, the LAX police chief, said the gunman came into Terminal 3 at 9:20 a.m. PDT. He pulled an assault rifle out of his bag and began firing. He moved into the screening area and continued shooting, Gannon said. He went passed the security area further into the terminal.

Authorities tracked him down and shot him near a Burger King.