LOS ANGELES (AP) — Prosecutors declined Tuesday to file criminal charges against former U.S. Commerce Secretary John Bryson, saying he suffered a seizure that was responsible for a trio of traffic accidents.

Authorities have said Bryson's Lexus struck a car on June 9 that was stopped for a train near Los Angeles. He spoke briefly with the three occupants then hit the car again as he departed, police said. Bryson then rammed another vehicle a few minutes later. He was found unconscious in his vehicle.

Bryson, 68, was cited by police for felony hit-and run, but tests reveal he didn't have any alcohol or drugs in his system. Low amounts of Ambien were found in his bloodstream, but investigators couldn't determine if the sleep aid was a factor in the collisions.