In an unexpected turn of events on Saturday, a piece of metal shrapnel from an “explosive ordnance” that detonated prematurely in the air struck a law enforcement vehicle in California. This incident occurred during an event attended by Vice President JD Vance.

The California Highway Patrol (CHP) released a statement, which they shared with Fox News Digital, confirming the incident. The event unfolded near Camp Pendleton, a Marine Corps installation located in San Diego County.

The shrapnel was discharged as CHP officers were facilitating a traffic break on I-5, coinciding with Vice President Vance’s visit to Camp Pendleton to mark the 250th anniversary of the US Marine Corps.

The exact timing of the incident on Saturday remains uncertain.

According to the CHP, the event occurred “during a remarkable US Marine Corps live-fire training exercise over the freeway,” during which the CHP had proactively decided to halt traffic to ensure safety.

No injuries were reported. CHP officers alerted the Marine Corps, who then “canceled firing additional live ordnance over the freeway,” per the agency.

In a statement, CHP Border Division Chief Tony Coronado called the incident an “unusual and concerning situation.”

“It is highly uncommon for any live-fire or explosive training activity to occur over an active freeway,” said Coronado. 

“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.”

“The CHP has filed an internal report on the incident, with a recommendation to conduct an additional after-action review into the planning, communication and coordination between federal, state, and local government around the event on Saturday, October 18, to strengthen protocols for future demonstrations and training events near public roadways,” the release concluded.

Camp Pendleton officials confirmed to Fox News Digital that they are also conducting an investigation after a 155mm artillery round may have detonated outside the designated impact area.

“We are aware of the report of a possible airborne detonation of a 155mm artillery round outside the designated impact area during the US Marine Corps Amphibious Capabilities Demonstration at Camp Pendleton, CA, Oct. 18,”  the I Marine Expeditionary Force Communication Strategy and Operations team told Fox News Digital.

“The demonstration went through a rigorous safety evaluation, and deliberate layers of redundancy, to ensure the safety of fellow citizens. Following established safety protocols, firing was suspended. No injuries occurred, and the demonstration concluded as scheduled.

“An investigation has been initiated. We are committed to determining the incident’s root cause and applying findings to future missions,” the statement continued.

“An investigation has been initiated. We are committed to determining the incident’s root cause and applying findings to future missions.”

In a post on X, California Governor Gavin Newsom wrote that President Donald Trump and Vance “put lives at risk to put on a show.”

“If you want to honor our troops, open the government and pay them,” Newsom said.

Fox News Digital reached out to Vance’s office for comment.

Fox News Digital’s Lee Ross contributed to this report.