Boston Marathon Explosion; Death Count At 12 [Developing]
Officials at the scene of the Boston Marathon - where two explosions have gone off - are placing the death count at 12, with nearly 50 injured.
The first of the explosions occurred in the lobby of the Fairmont Hotel - a complex that acts as race headquarters - near the finish line.
Meanwhile, police have found a third explosive device that did not go off.
EARLIER:
Police are investigating reports of explosions at the finish line of the Boston Marathon. The hotel that serves as the headquarters for the event is in a state of lockdown, as officials sort out the details.
The explosions happened about three hours after the finish of the marathon.
More to follow,