Two explosions have been reported near the Boston Marathon finish line on Boylston Street, and there are reports of injuries.
Crews were sent to 617 Boylston St. at about 2:30 p.m. Witnesses said several victims lost limbs, and the area was being evacuated.
Many of the injured appeared to be spectators who gathered for the 117th running of the race.
NewsCenter 5's Sean Kelly said the blasts happened across the street from the Lenox Hotel.
The victims were being taken to Massachusetts General Hospital.
NewsCenter 5 and WCVB.com will have more information when it becomes available.