Shrapnel from artillery that was detonated during celebrations for the US Marine Corps hit at least two vehicles on a California highway on Saturday, officials have confirmed.

The event, celebrating the Marines' 250th birthday, was attended by Vice President JD Vance, featuring live munitions fire. The California Highway Patrol reported that one round detonated overhead prematurely, damaging vehicles that were part of Vance's protective detail.

The incident occurred amidst state officials' concerns over closing part of Interstate 5 for the event. Governor Gavin Newsom called the decision to fire live rounds over a busy highway dangerous.

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

Fortunately, no injuries were reported, and the Marine Corps suspended further military exercises following the incident. Concern regarding such operations over an active freeway was reiterated by Border Division Chief Tony Coronado.

The situation escalated political tensions, with Newsom accusing the administration of putting lives at risk by prioritizing a spectacle over safety.

In response, Vance and his team defended the demonstration's intent, emphasizing military readiness and honoring the Marines, while dismissing Newsom's safety concerns as fear-mongering.

The incident sheds light on the ongoing discourse around military exercises in civilian areas and the essential balance between celebration and safety.