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BREAKING NEWS: 1 Bombing Suspect Dead, Another at Large

Written By: Joe Melillo

Police have a suspect in custody in Watertown, Mass.

BREAKING NEWS: 1 Bombing Suspect Dead, Another at Large
UPDATE: AP sources identify the suspect on the loose as 19-year-old Dzhokhar Tsarnaev, of Cambridge, Mass. He is the bombing suspect who is still alive. The other bombing suspect was killed overnight in an exchange of gunfire with police. The sources also say both men are from a region of Russia near Chechnya, and have lived in the U.S. for at least a year.

(ABC) - Police have a suspect in custody in Watertown, Mass., and the FBI are "aware of the law enforcement activity in the greater Boston area."
      Watertown police have blocked off at least one town street and multiple police cars, ambulances and fire trucks are on the scene. Police described the investigation in Watertown as "an active scene" and one person was taken into custody, but did not say what for.
      “We are aware of the law enforcement activity in the greater Boston area. The situation is ongoing. We are working with local authorities to determine what happened," the FBI said in a statement.
      Federal law enforcement sources say the FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives are involved in investigating the ongoing Watertown incident along with state and local authorities.
       There is no information definitively linking the the ongoing investigating in Watertown to Monday's Boston Marathon bombings.
       Massachusetts state police have tweeted guidance for Watertown residents to stay in their residences and not answer their doors unless it is for an identified police officer. Police are "going door by door, street by street, in and around Watertown. Police will be clearly identified. It is a fluid situation," according to the state police tweet.
       A Massachusetts Institute of Technology police officer was fatally shot Thursday night near a building on the university's campus in Cambridge, Mass. There is no word if the investigation in Watertown is connected to the MIT shooting.