Around 1400hrs, Pasco Fire Rescue were dispatched for a reported explosion. On arrival they nothing showing but found 2 injured men who were severely injured by the blast. According to the Sheriff's Office, a flashover from the two adult men spraying foam insulation inside an enclosed space. They were transported to a parking lot of a commercial store where they were airlifted by two Med-Trans Helicopters to a trauma center. No word on the extent of the injuries. The explosion still remains under investigation.