An artillery shell fired during a Marine Corps demonstration on Saturday detonated prematurely over California's Interstate 5, striking a California Highway Patrol vehicle with debris, authorities said.

No injuries were reported, but the vehicle was damaged, CHP said Sunday in a statement.

The live-fire event at Camp Pendleton was part of the U.S. Marine Corps' 250th Amphibious Capabilities Demonstration at Red Beach.

The incident occurred over a stretch of the I-5 where CHP officers were supporting a traffic break during the live-fire training demonstration.

The live shell was said to have detonated prematurely mid-air.

The Marine Corps has been notified of the incident, and additional live-fire demonstrations were canceled, CHP said.

"This was an unusual and concerning situation,"

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