LOS ANGELES (CBS/AP) -- A bomb threat phoned in to the FBI triggered the evacuation of several terminals at Los Angeles International Airport.

Airport police officials say people on the lower level of terminals 3 to 6 were diverted upstairs Saturday afternoon so a bomb squad can investigate the threat.

Officer Rob Pedregon said someone called the FBI saying there was a bomb inside a homeland security van parked in the lower level of terminal 4.

Traffic to the lower level was also diverted to the upper level, causing a backup.

Airport spokesman Marshall Lowe said he had no immediate information on any flight delay caused by the threat.

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