A 57-year-old man hung himself from the Magnolia Street bridge over I-405 on Saturday morning, authorities said.

A motorist’s sighting of the man prompted officers to respond to the scene at about 7 a.m., Westminster police Sgt. Cameron Knauerhaze said.

The man, later identified as Huntington Beach resident Michael Byrd, was found dead, and the Orange County coroner’s office took over the investigation, Knauerhaze said.

California Highway Patrol and Fountain Valley fire personnel also responded to the scene, he said.

The southbound lanes of the freeway were closed for a short while, but later reopened.