A U.S. Marine was killed Tuesday evening during an operation at Camp Pendleton's air base in California, the Marine Corps said.

The USMC said in a press release that the incident happened during a "routine military operation" at Camp Pendleton in San Diego.

The Marine died at 5 p.m. local time at the base on Tuesday. The USMC did not identify the Marine or a cause of death pending family notification.

MARINE KILLED IN TRAINING ACCIDENT NEAR CAMP LEJEUNE, LESS THAN 2 WEEKS AFTER PROMOTION, IDENTIFIED

The Marine was stationed with the Marine Light Attack Helicopter Training Squadron 303, Marine Aircraft Group 39, which is part of the Camp Pendleton-based 3rd Marine Aircraft Wing. 

MILITARY IDENTIFIES MARINE KILLED DURING CAMP PENDLETON TRAINING ACCIDENT

Officials stated the incident is being investigated, and no further details on the incident were released.

The death of a Marine at Camp Pendleton's air base comes just a week after Sgt. Colin Arslanbas, 23, was killed during a training accident at Camp Lejeune in North Carolina. 

According to a press release from Camp Lejeune officials, Arslanbas was killed during a training accident on April 18.

The fatal accident happened shortly after 11 p.m., near Marine Corps base Camp Lejeune in Carteret County.