California Highway Patrol officials say that a patrol vehicle was struck by shrapnel from an artillery round that was fired during Saturday's live-fire event at Camp Pendleton to celebrate the U.S. Marine Corps' 250th anniversary.

According to California Highway Patrol, the explosive ordinance that was fired over the freeway detonated overhead prematurely, striking and damaging a patrol vehicle.

California authorities say metal shrapnel from an exploding artillery shell hit and damaged a state highway patrol vehicle as the Marine Corps fired live rounds over a freeway during exercises observed by Vice President JD Vance.

California Gov. Gavin Newsom lashed out at the Trump administration prior to the event, saying it was dangerous to fire live rounds over a highway.

Traffic delays could be significant Saturday with the U.S. military planning to fire live artillery rounds over Interstate 5 in Southern California. The freeway will be shut down temporarily Saturday afternoon.

CHP shared on Sunday that an explosive ordnance detonated prematurely over the I-5 freeway causing a piece of metal shrapnel to strike and damage a patrol vehicle.

The decision to close Interstate 5 due to live-fire at Camp Pendleton was made early Saturday, a California Highway Patrol official told KPBS.

Thousands of Marines and veterans were streaming into a make-shift stadium at Camp Pendleton Saturday to observe a huge live-fire amphibious assault landing that’s being staged to celebrate the 250th anniversary of the Navy and Marines.