Two Arizonans are among those killed when a pickup truck crashed off the Coronado Bridge.

Authorities say two people from Chandler, a 62-year-old man and a 50-year-old woman, were among the four killed when the truck crashed off the bridge into a crowd of people in Chicano Park, the San Diego Police Department said.

California Highway Patrol says the crash happened around 3:34 p.m. when a driver in a GMC pickup truck was traveling northbound on I-5, transitioning westbound onto the Coronado Bridge when they lost control and fell about 60 feet below.

The four killed were attending a La Raza motorcycle event at Chicano Park were killed when the truck crashed into them.

The driver of the truck has been placed under arrest for being under the influence of alcohol when the crash occurred, according to CHP Officer Jake Sanchez.

The driver was transported to UCSD Medical Center with major injuries. Eight people were injured, one seriously.

San Diego Police said officers were nearby when the crash happened and helped to make way for firefighters. They said people attending the event helped to lift the truck off of people.

The westbound onramp to the Coronado Bridge will be closed for several hours. Drivers are advised to take The Strand.