SAN FRANCISCO — A California Highway Patrol officer died after a drunken driver returning from a party slammed into the back of his parked patrol car on a San Francisco Bay Area highway on Christmas Eve, the Highway Patrol said Monday.

Officer Andrew Camilleri, a 33-year-old married father of three children, was in the passenger seat of the patrol SUV on Interstate 880 in Hayward, Calif., when the vehicle was struck.The back end of the patrol car was mangled.

‘‘It’s definitely not the way we wanted the community to think of the 2017 Christmas Day holiday,’’ Assistant Chief Ernest Sanchez said.

A second officer in the vehicle, Jonathan Velasquez, was treated at a hospital and released.

The 22-year-old driver who struck the officers suffered serious injuries. Sanchez said the man may also have been under the influence of marijuana.

Governor Jerry Brown said Camilleri died while ‘‘working to keep our communities safe.’’

‘‘We join his family, friends and the entire California Highway Patrol in mourning his death and in honoring his sacrifice,’’ Brown said.

In Maryland, 10 people were injured, three seriously, in a Christmas Eve crash near Baltimore, police said.

Anne Arundel County Police said the three-vehicle crash occurred Sunday night in Churchton, Md. Officers said a Volkswagen Golf was speeding when it drifted across the center line, sideswiping a Lincoln Navigator and striking a Ford pickup truck head on.

ASSOCIATED PRESS