MONDAY, April 15 (HealthDay News) -- Two bombs exploded near the finish line of the Boston Marathon on Monday, killing at least two people and injuring dozens more.
A loud explosion occurred about four hours after the winners crossed the finish line and another explosion rocked the area a few seconds later. Authorities headed onto the race course to carry away the injured, and runners who hadn't completed the 26.2-mile race were routed away from the site of the blasts, the Associated Press reported.
Just before 4 p.m., roughly an hour after the first blast, a third explosion could be heard. The police knew about that bomb before it exploded, The New York Times reported.
"We still do not know who did this or why; we still don't have all the facts," President Barack Obama said shortly after 6 p.m. "We will get to the bottom of this. We will find who did this, and we will find out why they did this. Any responsible individuals, any responsible groups, will feel the full weight of justice."
One senior counterterrorism official told the Times it was too soon to tell whether the explosions were related to terrorism.
Injured people were taken to a medical tent that had been set up to care for fatigued runners. They included a woman with a bloody wound on her leg and a Boston police officer who also had a leg injury that was bleeding.
"There are a lot of people down," a male runner told the AP. "There are people who are really, really bloody," said Laura McLean, a runner from Toronto. She was in the medical tent being treated for dehydration when she was moved out to make room for people injured in the explosions.
TV footage taken from a helicopter showed blood staining the pavement in the popular Black Bay shopping and tourist area.
The marathon honored the victims of the Newtown, Conn., shooting massacre in December with a special mile marker in Monday's race, the AP reported.