LOS ANGELES—A motorist was killed March 26 morning when his vehicle went off a bridge in Boyle Heights and landed on its roof onto the Golden State (5) Freeway, authorities said.

The vehicle landed on the southbound 5 Freeway at Whittier Boulevard at about 1:15 a.m. Sunday, the California Highway Patrol reported, adding that it “may have come off an overcrossing onto the freeway.”

The crash triggered a Sigalert that closed four lanes of the southbound freeway until 4:24 a.m.

The motorist was pronounced dead at the scene. No other injuries were reported.