UPDATE: Los Angeles Airport Police Chief Patrick Gannon said at least seven people were injured in today’s shooting at LAX. Three victims were transported to UCLA Medical Center, one of them in critical condition. One victim had injuries not directly related to the gunfire.

The gunman opened fire with an assault rifle at 9:20 a.m. at Terminal Three. TSA officers exchanged gunfire with the gunman, who was wounded in the shootout, Gannon said

The FBI is leading the shooting investigation.

“At this point, we don’t anticipate any more threats,” FBI Special Agent David Bowdwich said.

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Los Angeles International Airport went on lockdown Friday morning after a gunman shot and killed a Transportation Security Administration officer and wounded several others inside Terminal 3.

Airport terminals were evacuated and flights were grounded as public safety officials swarmed the scene.

The suspected shooter has been taken into custody. The man was wearing military-style clothing and armed with a rifle, according to public officials and news reports.

It is believed the shooter acted alone and targeted TSA employees, Los Angeles Airport Police Chief Patrick Gannon said during a press conference at LAX.

The Los Angeles Times and other news agencies are reporting that the shooting suspect may have been a TSA employee. A law enforcement source told the Times the suspect may have died from wounds he sustained during the incident.

Airport entrances and nearby roads remained closed early Friday afternoon.

Some passengers who had been evacuated from airport terminals into parking garages and other areas have been allowed to return, with flights that had been grounded now departing from several terminals, according to posts on the Twitter account of Los Angeles Mayor Eric Garcetti.

Check ArgonautNews.com for updates.

— staff reports