A series of explosions erupted near the finish line at the Boston Marathon on Monday. The Boston Police Department confirmed that they were looking into an explosion, but had no further comment.
The explosions at the Boston Marathon went off more than four hours after the start of the men’s race, which meant that there were still several thousand runners yet to finish the race.
The Associated Press reported that the authorities were helping injured runners leave the scene and bloody spectators were being carried to a medical tent that was being used for runners.

via Explosions Reported at Site of Boston Marathon – NYTimes.com.