TRACY, Calif. — Authorities say an off-duty law enforcement officer was killed Friday morning when a bus carrying Tesla employees crashed into the officer’s car east of San Francisco.

The name of the officer was not released. Authorities also declined to say what law enforcement agency the person worked for until their family is notified. One bus passenger had minor injuries.

The San Francisco Chronicle reports (http://bit.ly/2q9FMZi) the California Highway Patrol says the collision occurred when the off-duty officer’s Volkswagen was stopped on the highway and was rear-ended by the bus on the Altamont Pass in Tracy, about 75 miles (120 kilometers) east of San Francisco.

The bus driver told CHP officers he didn’t see the car because the sun was in his eyes.

Three eastbound lanes of Interstate 580 remain blocked.