Via Computer World: A fixed camera captured the moment two explosions rocked the finish line of today's Boston Marathon.
Incredible video of the explosions as they happened from Boston.com
More from the police press conference:
Police may continue blowing things up (controled explosions) in next couple of hours.
Question: Is this a terrorist attack?
Answer from Boston Police Commissioner Edward Davis: "We're not being definitive at this time but you can reach your own conclusions."
From the Boston police department:
More from the Boston press conference:
From the police press conference in Boston:
Edward Davis, Boston Police Commissioner, says the blasts occurred 50 to 100 yards apart. Multiple casualties. All victims been removed from scene. Sent officers to hospitals to be in touch with family members and possible witnesses. Immediately activated system of resposnse that the commonwealth of Massachusettes has in place.
First calls were to FBI and state police.
There is a third incident, an explosion at the JFK Library. But authorities are not certain incidents are related. Recommending people stay home.
Anyone with information should call 1-800-494-TIPS
The FAA has imposed a no-fly zone over the site of the Boston Marathon explosions.
The White House says President Obama has called Boston Mayor Tom Menino and Massachusetts Governor Deval Patrick and told them his administration would provide whatever assistance is necessary in the investigation and response.
The New York Times just published a very useful graphic of the explosion locations
Meanwhile, New York City is stepping up security at various locations in response to the blasts in Boston.
At least one college in the Boston area is sending out alerts to its students.
More pictures of the aftermath from Twitter.
In a post on Facebook, Boston marathon says: "There were two bombs that exploded near the finish line in today's Boston Marathon. We are working with law enforcement to understand what exactly has happened."
Boston police say 2 are dead and 23 were injured by the explosions.
A spokeswoman for Massachusetts General Hospital said four patients were being treated there.
A New York City Police Department spokesman said the city has stepped up security around landmarks in Manhattan, including near prominent hotels, in response to the blast.
Here are some early pictures and video of the explosions.