SAN DIEGO - Police say a member of the U.S. Navy was driving a pickup truck that flew off the San Diego-Coronado Bridge and fatally killed four people who were at a festival at a park below.

Authorities say 25-year-old Richard Anthony Sepolio, who suffered major injuries in Saturday's crash, was arrested on suspicion of driving under the influence. He was stationed at a naval base in Coronado Island, across a bay from San Diego.

The California Highway Patrol said Sepolio lost control of a GMC pickup truck with Texas license plates while driving onto the bridge, struck a guardrail and plunged about 60 feet onto a vendor booth set up for a motorcycle festival at Chicano Park.

Witnesses said four people in the booth were crushed by the truck. Eight people on the ground were injured.