SAN DIEGO (FOX 5/KUSI) -- Metal shrapnel from explosive ordnance that was fired over Interstate 5 during a U.S. Marine Corps live-fire training demonstration over the freeway Saturday struck a California Highway Patrol vehicle, authorities said.

The incident occurred in the area where CHP officers were supporting a traffic break along I-5 near Camp Pendleton, according to law enforcement.

CHP Border Division Chief Tony Coronado called the incident "unusual" and a "concerning situation.”

“It is highly uncommon for any live-fire or explosive training activity to occur over an active freeway. As a Marine myself, I have tremendous respect for our military partners, but my foremost responsibility is ensuring the safety of the people of California and the officers who protect them,” Coronado

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