The artillery rounds were fired over Interstate 5 near Camp Pendleton in San Diego as part of a military demonstration for the Marine Corps' 250th anniversary.

A patrol vehicle was struck by shrapnel from an artillery round that was fired during Saturday's event at Camp Pendleton, officials said.

Marines are investigating after a 155mm artillery round exploded over Interstate 5, hitting California Highway Patrol vehicles with shrapnel.

CAMP PENDLETON — Ordnance fired over the 5 Freeway at Saturday’s 250th anniversary of the Marine Corps at Camp Pendleton prematurely detonated, striking and damaging a California Highway Patrol vehicle that was part of Vice President JD Vance’s detail, the CHP said Sunday.

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

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 parents of a 24-year-old U.S. Marine reservist were detained by U.S. Immigration and Customs Enforcement upon visiting family at Camp Pendleton last month. The father was deported to Mexico, while the mother remains in detention,

Mike Levin issued a statement Wednesday expressing concern over potential plans to close portions of Interstate 5 this weekend amid reports Navy ships will fire live ordnance over the freeway during the Marine Corps’ 250th birthday celebration at Camp Pendleton.