All the major news outlets are covering the explosions in Boston; two at the finish line of the Boston Marathon on Boylston Street. At this point, two people have been pronounced dead with dozens injured. Police are considering it an act of terrorism.
Video from the finish line at the marathon showed people screaming and an enormous cloud of white smoke, and about 20 seconds between the blasts. The explosions were strong enough to cause at least one runner to collapse, and emergency personnel carried bloody spectators away.
“We saw two big puffs. I thought maybe it was fireworks. Then it went off again. And then all of a sudden we heard people crying and running away. It was a huge horde of people just running away,” said Serghino Rene, another witness, who was a few blocks away. “We just got away from the scene and away from tall buildings.”
A third, undetonated device was found near the finish line, a House Homeland Security Committee official and three law enforcement officials told NBC News.
Police said at least 23 people had been injured, but the count from hospitals was much higher. Massachusetts General Hospital said that it had 19 patients, Tufts Medical Center nine and Brigham and Women’s Hospital 18 to 20 — a total of 46 to 48.
Earlier reports of an explosion at the Kennedy Library have been debunked as an unrelated incident.
Update – 9:15 p.m. ET: The death toll now stands at three; several other unexploded devices were found; President Obama says don’t rush to judgment on who did it or why, but they will be found and tried.