CAMP PENDLETON, Calif. -- Metal shrapnel from an explosive ordinance fired during the U.S. Marine Corps' 250th anniversary celebration at Camp Pendleton on Saturday hit a California Highway Patrol vehicle, the agency published in an internal report.

The celebration, which included a military exercise using live artillery fire, shut down a 17-mile stretch of the 5 Freeway in both directions off and on for about four hours, stranding drivers for hours.

A 17-mile stretch of the 5 Freeway was shut down Saturday because of a military event involving live ammunition at Camp Pendleton.

CHP says around 1:46 p.m., an explosive ordnance that was fired over the freeway prematurely detonated overhead from White's Beach, about three-quarters of a mile south of Las Pulgas Road, striking and damagin

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