California will close part of Interstate 5 today after military officials confirmed Saturday that live-fire artillery rounds will be shot over the freeway during a Marine Corps event.

I-5 closes 11 a.m.–3 p.m. for Marine Corps 250th anniversary live-fire demo at Camp Pendleton; expect major SoCal traffic delays.

A celebration scheduled for this weekend at Camp Pendleton has turned into a national debate between California Governor Gavin Newsom and the Trump administration over potential closures of I-5.

The California Highway Patrol reopened a large swath of Interstate 5 Saturday after it was closed for a few hours during a live-fire demonstration at Camp Pendleton witnessed by Vice President JD Vance and Defense Secretary Pete Hegseth,

I-5 near Camp Pendleton reopens after a military demonstration closure. Politicians criticize the decision as motorists face delays and disruptions.

"Because of the event and closure, drivers should expect delays on Interstate 5 and other state routes throughout Southern California before, during, and after the event," the press release says.

CHP reports that a section of Interstate 5 in San Diego — from Harbor Drive to Basilone Road in Oceanside — will be closed from about 11 a.m. to 3 p.m

Vice President JD Vance is coming to Camp Pendleton on Saturday for the event. That’s led to planned freeway closures near the base.

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.