Earlier on Monday, we posted a timeline of events surrounding the bombings at the 2013 Boston Marathon. Here is an updated timeline of events as they unfolded throughout Monday night. All times are Eastern.
2:50 p.m.: With 4:09:43 showing on the race clock, an explosion goes off just short of the finish line of the 2013 Boston Marathon. Ten seconds or so later, a second explosion goes off 1500 yards away on the same street, Boylston Street, along the finish of the race.
2:57 p.m. The Boston Globe's Twitter feed reports a witness hearing "two loud booms" near the finish line.
3:14 p.m. Video emerges online of the scene following the explosions.
3:15 p.m. Runners still on the marathon course are stopped. They are rerouted to Boston Common.
3:55 p.m. Boston police detonate a suspicious object near Copley Square in a controlled explosion, per the Boston Police scanner.
4:02 p.m.: Boston police confirm 2 dead and 12 injured in the explosions via Twitter.
4:12 p.m. Boston police respond to a third explosion, at the JFK Library in Dorchester. No injuries are reported.
4:24 p.m. The AP, quoting an anonymous U.S. intelligence official, reports two undetonated explosive devices were recovered from the scene.
4:44 p.m. White House statement announces a Presidential address at 6:10 p.m. regarding the explosions.
4:44 p.m. News leaks that the Boston Bruins opted to postpone Monday's scheduled home game with the Ottawa Senators.
4:50 p.m. Boston police confirm the two explosions at 2:50 p.m. in a televised press conference with Massachusetts Governor Deval Patrick. Boston police also confirm a fire and possible explosion at the JFK Library, which they consider related. They emphasize that a link between the two marathon explosions and the third is only suspected, and not confirmed.
5:01 p.m WBZ reports cellphone service in downtown Boston has been shut off to prevent any detonation of other possible explosive devices which may be in the area.
5:06 p.m. JFK Library spokesman says the third incident may have just been a mechanical room fire, and says there were no injuries in the incident.
6:12 p.m. President Obama addresses the nation. "The American people will say a prayer for Boston tonight."
6:30 p.m. NBC reports that one of the victims killed by the bombings was eight years old, according to a law enforcement official.
6:55 p.m. The Boston Globe releases a map showing the locations of the explosions.
8:17 p.m. The Boston Athletic Association releases an official statement regarding the bombings. "We can confirm that all of the remaining runners who were out on the course when the tragic events unfolded have been returned to a community meeting area."
8:19 p.m. The NBA announces that the April 16 game between the Pacers and Celtics at the TD Garden has been canceled and will not be rescheduled.
8:49 p.m. At an evening press conference, Massachusetts Gov. Deval Patrick announces that the FBI has taken over the investigation. At this press conference, it is confirmed that three people died as a result of the bombings and at least 100 others were injured.