Washington (CNN) - President Barack Obama was again briefed Friday by his top national security team as a massive manhunt unfolded for one of the suspected perpetrators in the Boston Marathon bombings.
The briefing concluded shortly after 4 p.m. ET, according to a White House official. He then called Massachusetts Gov. Deval Patrick and Boston Mayor Thomas Menino "to express his condolences for the MIT police officer who was killed overnight," the official stated.
"The President said that the entire country is behind the people of Boston as well as Massachusetts, and that the full force of the Federal Government will continue to be made available until those responsible are brought to justice," the official said.
Lisa Monaco, assistant to the president for Homeland Security and Counterterrorism, briefed the president Friday afternoon in the Oval Office.
Earlier in the day, Obama met in the Situation Room with more officials, including Monaco, Vice President Joe Biden, Attorney General Eric Holder and FBI Director Robert Mueller. It began at 9:45 a.m. ET and ended at 10:45 a.m. ET.
Other top officials present included Obama's chief of staff Denis McDonough and National Security Adviser Tom Donilon.
Homeland Security Secretary Janet Napolitano, Secretary of State John Kerry, and CIA Director John Brennan participated in the morning briefing by videoconference, the official said.
CNN identified Kerry, along with Defense Secretary Chuck Hagel and Director of National Intellegence James Clapper, entering the White House later Friday, though a White House official said they were attending a previously scheduled meeting of top national security officials that does not include the president.
Obama was briefed overnight by Monaco on the situation unfolding in Boston and Watertown, Massachusetts.
Napolitano, previously scheduled to testify at a Congressional hearing Friday, cancelled her appearance because of the ongoing situation in the Boston area.