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,

http://www.latimes.com/news/nationworld/nation/la-two-explosions-at-boston-marathon-finish-line-20130415,0,5849240.story

More details

Boston Marathon explosion - chicagotribune.com.