Three dead and at least 140 injured in the deadly bombings at the Boston Marathon, multiple updates, videos of the explosions and photos from the gruesome scene, in an early article.
CBS News correspondent Bob Orr reported earlier that police recovered surveillance video from the area which shows a man with what looked to be two backpacks near the scene just moments before the blast.
Fox News confirms there were five explosive devices found in the Boston area, including the two that exploded.
More:
The Associated Press reported early Tuesday police are searching an apartment in the nearby Boston suburb of Revere as part of the investigation into the explosions. Massachusetts State Police confirmed that a search warrant was served Monday night but provided no further details.
Authorities are guarding a person of interest at a local hospital, according to a New York Post report confirmed by Fox News.
The person, who sources said was 20 years old, had severe burns, but authorities had not determined whether the person was a victim or a perpetrator. Sources say the person of interest is reportedly a Saudi national in the United States on a student visa.
“There is no suspect,” said Boston Police Commissioner Edward Davis. “There are people we’re talking to.”
[Update] Mass Governor denies the presence of unexploded bombs.
Although Obama refrained from calling these attacks terrorism, a White House official followed up on Obama' s remarks with a written statement which said "Any event with multiple explosive devices -- as this appears to be -- is clearly an act of terror, and will be approached as an act of terror." The statement continued, "We don’t yet know who carried out this attack, and a thorough investigation will have to determine whether it was planned and carried out by a terrorist group, foreign or domestic. "