It could be, but I genuinely think there's more to it than meets the eye. And it's extremely doubtful that an 18v drill battery could cause enough of a bang to injure 4 or 5 people. The police have become somewhat shifty and dishonest in recent times, and if you don't believe that, you've clearly had little to do with them.
@Russ Putin, chances of a drill battery 'short circuiting' and exploding? If you tell me it may be so, I'll believe it.