Reports say the explosions sounded like cannons, seconds apart from each other. The AP reports that runners and race organizers were crying as they fled the scene. Runners completing the race were being stopped and directed elsewhere. The Massachusetts Emergency Management Agency suggests people try to reach loved ones using text messaging.
The Boston police bomb squad is on scene. Some transit was suspended.
Update 4:10 pm EST: 2 reported dead, 23 injured.
Update 4:20 pm EST: Boston Police Report one of the bombs an IED, a homemade bomb.
Update 4:22 pm EST: AP reports two more bombs found, being dismantled.
Update 4:35 pm EST: Reuters reports another explosion at the JFK Library.
Update 4:42 pm EST: Massachusetts Governor Deval Patrick gives statement: “This is a horrific day in Boston. My thoughts and prayers are with those who have been injured. I have been in touch with the President, Mayor Menino and our public safety leaders. Our focus is on making sure that the area around Copley Square is safe and secured. I am asking everyone to stay away from Copley Square and let the first responders do their jobs.”
Update 4:48 pm EST: Injured count rises to 64, reported by the Boston Globe.
Update 5:09 pm EST: Cellphone service shut down in the Boston to prevent any potential remote detonations of explosives.
Update 5:41 pm EST: Boston Globe says JFK Library incident seems to be fire-related. 90 reported injured.
Will keep updating as reports come in.