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

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

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.

Gavin Newsom bashed JD Vance, saying he was "reckless" to move forward with a 250th anniversary celebration of the Marine Corps., where shrapnel hit security detail vehicles

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.

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.

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,

The U.S. military demonstration that shot live-fire artillery rounds over Interstate 5 on Saturday dropped metal shrapnel on a California Highway Patrol vehicle, resulting in damage, agency officials said Sunday.