Oct. 18 (UPI) -- The U.S. Marine Corps' live-fire event at Camp Pendleton as part of its 250th birthday celebration will cause the closure of Interstate 5 for four hours on Saturday.

The closure is a precaution due to the firing of explosive artillery rounds over the freeway from gunnery ranges at Camp Pendleton in Southern California, which has drawn the ire of California Gov. Gavin Newsom.

Newsom accused President Donald Trump of "putting his ego over responsibility with this disregard for public safety" in a prepared statement released on Saturday morning.

"Firing live rounds over a busy highway isn't just wrong -- it's dangerous," Newsom said.

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