URGENT UPDATE: An artillery shell fired during a U.S. Marine Corps demonstration detonated over California’s Interstate 5 on October 18, 2025, striking a California Highway Patrol (CHP) vehicle with debris. Fortunately, no injuries were reported, but the incident has raised significant safety concerns and led to immediate cancellations of further live-fire demonstrations.
The live-fire event, part of the Marine Corps’ 250th Amphibious Capabilities Demonstration at Red Beach, occurred while CHP officers were managing traffic on I-5. Eyewitness accounts indicate that the shell detonated unexpectedly mid-air, showering debris over the highway. CHP officials are calling this an “unusual and concerning situation.”
CHP Border Division Chief Tony Coronado, an active Marine, emphasized the rarity of such incidents. “It is highly uncommon for any live-fire or explosive training activity to occur over an active freeway,” he stated in a press release. The Marine Corps has confirmed they are investigating the incident and have suspended firing operations while reviewing safety protocols.
California Governor Gavin Newsom had proactively closed the section of I-5 ahead of the demonstration, citing safety concerns. He expressed outrage over the incident, emphasizing, “This could have killed someone.” Newsom criticized the event’s scheduling, stating, “Firing live rounds over a busy highway isn’t just wrong—it’s dangerous.”
The demonstration involved forces from the I Marine Expeditionary Force and the U.S. Third Fleet, showcasing the military’s capability to project power globally. Despite rigorous safety evaluations conducted prior to the event, the premature detonation has prompted an internal review by CHP to enhance coordination among federal, state, and local authorities for future training events near public roadways.
“We are aware of the report of a possible airborne detonation of a 155mm artillery round outside the designated impact area,”
said Capt. Gregory Dreibelbis, a spokesperson for the Marine Corps. He assured that safety protocols would be thoroughly examined to prevent such incidents in the future.
In light of these developments, the CHP has initiated an internal report and recommended a comprehensive after-action review. This review aims to strengthen protocols and communication channels to ensure public safety during military training exercises.
The situation continues to evolve as the Marine Corps conducts its investigation. Residents and commuters are urged to stay updated on any announcements regarding future live-fire demonstrations and safety measures on public roadways.
This shocking incident has sparked widespread discussions about military safety practices and the responsibilities of government officials in ensuring public safety during military operations. As investigations proceed, both military and civilian authorities will be scrutinized for their roles in this alarming event.
Stay tuned for further updates as this story develops.
