Around 10 pounds of explosives have vanished from a Marine Corps base in Southern California, reports said Thursday. 

The explosives, identified as C-4, were being stored at the Marine Corps Air Ground Combat Center Twentynine Palms in San Bernardino County, east of Los Angeles, KGTV-TV of San Diego first reported, citing a source with knowledge of the situation.

NORTH CAROLINA WOMAN WHO WAS OLDEST LIVING US MARINE DIES AT 107

Marines training at Marine Corps Air Ground Combat Center Twentynine Palms.

Marines training at Marine Corps Air Ground Combat Center Twentynine Palms. (Lance Cpl. Joshua Sechser/Marine Corps Air Ground Combat Center Twentynine Palms)

"Out of respect for the investigative process, NCIS does not comment on or confirm details relating to ongoing investigations," Naval Criminal Investigative Service (NCIS) spokesman Jeff Houston told Fox News in an email early Friday. 

The C-4 disappeared during a long training exercise two weeks earlier and may have been stolen. A reward was being offered for its safe return, the San Diego station reported.

CLICK HERE TO GET THE FOX NEWS APP

C-4 is a high-powered explosive and one-tenth of the amount stolen could blow up a car, a former bomb technician told KGTV.