Two Massive Explosions Reported At Boston Marathon Finish Line
Update 7:19: CNN reports that at least two are dead with over 110 people injured, including eight children.
Update 7:07: ABC News reports that BPD will hold a conference at the Westin tonight at 8:30pm ET.
Update: 6:31: "We still do not know who did this or why," Obama said from the Brady Press Briefing Room, cautioning people against jumping to conclusions. "But make no mistake, we will get to the bottom of this, and we will find out who did this, we'll find out why they did this."
Update 5:43: President Obama is due to speak at 6pm ET.
Update 5:35: From WCVB's Kristen Setera: "Boston Police has evacuated emergency room at Tufts Medical Center as precaution. Upwards of 80 people already sent to area hospitals."
Officials saying that JFK Library bomb was not related to earlier incidents.
Update 5:31: Google launches a Person Finder for Marathon runners.
Update 5:21: The FAA has announced a ground stop for Logan Airport until further notice. Security has been heightened in New York, D.C., LA and San Francisco. A marathon runner gave the Boston Globe a firsthand account. More on the story here.
Boston-area readers: To donate blood to victims, please call 617-632-3206
Update 5:10pm ET: A third bomb went off at JFK Library in South Boston. No reports of injuries at press time. The Boston Globe reports that more than 100 people are being treated after Marathon explosions. Cellphone service has been shut down to prevent remote detonations of explosives (via AP)
BREAKING NEWS: Several explosions were reported on Monday near the finish line of the Boston Marathon, according to NBC News. Witnesses say two explosions occurred on Boylston St. at about 2:50PM ET, leaving two dead and at least 28 people injured.
Images and video coming out of the Marathon showed several people being carried to nearby medical tents that were initially in place for fatigued runners.
Race officials reported that almost 27,000 people participated in today's Marathon.
For more on this story, head over to MSNBC.