A federal agent believes gunpowder caused an explosion that ripped through a Mason County underground bunker early Monday morning.
Paul Cross with the Bureau of Alcohol, Tobacco, Firearms and Explosives says a businessman was storing different types of gunpowder for resale in the bunker.
Over time and with heat, Cross says gunpowder can be deteriorate and become unstable.
The explosion was reported at 1:13 a.m. in the McClintic Wildlife Management Area just north of Point Pleasant. No injuries were reported.
The Division of Natural Resources owns several concrete bunkers that were used to store explosives during World War II. DNR spokesman Hoy Murphy says the bunkers are leased out to businesses for storage.
©2010 The Associated Press. All rights reserved.