Updated 6:20 pm ET
President Obama was briefed today by senior officials on the explosions in Boston.
From a White House pool reports:
On background from a WH official:
“Shortly after being notified of the incident around 3pm EDT, the President received a briefing from Homeland Security adviser Lisa Monaco and other members of his senior White House staff in the Oval Office. The President called Boston Mayor Tom Menino and Massachusetts Governor Deval Patrick to express his concern for those who were injured and to make clear that his administration is ready to provide needed support as they respond to the incident.
“This afternoon, the President received briefings from FBI Director Robert Mueller and DHS Secretary Janet Napolitano on the active investigation and response to the incident in Boston, including the ongoing coordination with state and local officials.
Security was tightened around the White House this afternoon as the Secret Service closed off the Pennsylvania Avenue pedestrian walk on the north side of the building.
As of 5:08 pm ET, reports indicated that two people are dead and 23 were injured from two blasts that occurred at the finish line of the Boston Marathon. A third blast at the JFK presidential library in Boston is also under investigation.
The White House this afternoon released a photo of Obama being briefed on the phone by FBI Director Mueller. Seated with the President are White House homeland security advisor Lisa Monaco and Chief of Staff Denis McDonough.