Hundreds, and possibly thousands, of armor-piercing grenades, hundreds of pounds of plastic explosives, land mines and rockets have reportedly been stolen from or lost by the U.S. armed forces over the past decade.

The findings are part of an Associated Press investigation into the military’s reported failure to secure weapons.

In one instance, the wire service reports, a Marine Corps demolition specialist stole 13 pounds (6 kilograms) of C4 plastic explosives from the training ranges of Camp Lejeune, claiming he was worried about a possible civil war following a presidential election. At least some of the stolen material was recovered in 2018.