UPDATE: An artillery shell detonated over California’s Interstate 5 during a Marine Corps demonstration, striking a California Highway Patrol (CHP) vehicle with debris. This alarming incident occurred on October 20, 2025, and while no injuries were reported, the damage to the patrol car raises serious safety concerns.
The live-fire event, part of the U.S. Marine Corps’ 250th Amphibious Capabilities Demonstration at Red Beach, unfolded as CHP officers were conducting a traffic break in the area. The artillery round reportedly detonated prematurely in mid-air, leading to immediate action from authorities.
CHP officials confirmed that they have filed an internal report and are recommending an after-action review to enhance coordination between federal, state, and local governments regarding safety protocols for future demonstrations. CHP Border Division Chief Tony Coronado, an active Marine, described the event as “unusual and concerning,” emphasizing that such live-fire activities over active roadways are typically avoided.
The Marine Corps is currently investigating the incident. Spokesperson Capt. Gregory Dreibelbis stated, “We are aware of the report of a possible airborne detonation of a 155mm artillery round outside the designated impact area during the U.S. Marine Corps Amphibious Capabilities Demonstration.” He reassured the public that the event had undergone a rigorous safety evaluation.
California Governor Gavin Newsom had closed the affected section of I-5 as a precaution prior to the event. He criticized the decision to conduct the demonstration over a busy highway, stating, “This could have killed someone.” Newsom condemned the use of military demonstrations in civilian areas, labeling it reckless and dangerous.
As a result of this incident, further live-fire demonstrations have been canceled. The CHP is urging a thorough review of safety measures to prevent any future occurrences that may endanger the public.
This situation continues to develop, and officials are expected to release more information as investigations proceed. Stay tuned for updates as more details emerge regarding this alarming incident on I-5.
