ERIN MCCLAM | NBC NEWS
UPDATED 2:50 p.m.
Though police counts remain at 23 injured, local hospitals are reporting at least 46 patients due to the explosions.
UPDATED 2:20 p.m.
Authorities reported a third explosion at the John F. Kennedy Library, elsewhere in the city, more than an hour after the blasts. There were no immediate reports of injuries. Police are now addressing it as a fire-related issue and not connected to the previous explosions, according to local media outlets. The police commissioner urged people in Boston to stay inside.
Two explosions went off near the finish line of the Boston Marathon Monday, killing 2 and injuring at least 23 among the runners and spectators. The blasts were described by race organizers as two bombs. A third explosive device was discovered and set off in a controlled explosion by law enforcement officials.