Pair of Explosions at Boston Marathon Kills Three, Injures Many

Tragedy has struck the 117th Boston Marathon, as two explosions near the finish line have reportedly resulted in multiple casualties and countless injuries. 

Details are still murky on this developing story, but the Boston Globe has announced these staggering figures:

WCVB in Boston is reporting that two more devices were dismantled following the first set of explosions:

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A senior U.S. intelligence official said two more explosive devices were found near the area, and they were being dismantled.

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According to WCVB, the explosions occurred around 2:50 p.m. ET on Boylston Street after most runners had completed the race. 

The network also passed along that the injured—some of whom had lost limbs, according to witnesses—were brought to the medical tents that were set up prior to the marathon. CNN has also reported that several victims are being treated at Massachusetts General Hospital. 

UPDATE: Monday, April 15, at 6:20 p.m. ET by Eric Ball

There was a report from the Boston Police Department's Twitter feed that an incident occurred at the JFK library located several miles away, and that it could be related to the Boston Marathon explosions. However, the Boston Globe's Jennifer Peter is reporting that whatever happened at the library is unrelated:

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Though more details are gradually coming to light, plenty of confusion is still surrounding this incident. As of now, there is only speculation as to the cause of the explosions.  

Whatever the case may be, there is obviously great concern over the well-being of everyone injured in the blasts.