Desmond discovers a large amount of C-4 on the freighter

Desmond seems to have found th source of the interference on the freighter. It's a large amount of C-4, most likely controlled by the device on Keamy's arm. The text on the C-4 says, "EXTREMELY HAZARDOUS AUTHORIZED MILITARY PERSONNEL ONLY." It's very similar to the explosives in Michael's case from Ben.

Will the explosives be activated and if so, by who?