One runner says he saw at least two dozen people with very serious injuries at the finish line of the Boston Marathon, after the twin explosions there. The runner, a Rhode Island state trooper, says the injuries included missing limbs.
Race organizers and police say two people were killed and nearly two dozen others were injured when two bombs exploded near the finish line, about three hours after the winners had completed the race.
Competitors and race volunteers were crying as they fled the chaos and as bloody spectators were carried to the medical tent that had been set up to care for fatigued runners.
Authorities went onto the course to carry away the injured. Those who hadn't yet finished the race were rerouted away from the area.
Smoke rose from the blasts, fluttering through the flags lining the route. TV helicopter footage showed blood staining the pavement in the popular shopping and tourist area known as the Back Bay.