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Those words may have helped crack the mystery of who perpetrated one of the highest-profile acts of terror in the U.S. since the 2001 assault on New York City and the Washington area, one that killed three people and wounded scores.

The Boston area was on lockdown this morning after law enforcement officials killed one suspect in the bombing and were hunting another, following a night of violent clashes between the two men and authorities that killed a Massachusetts Institute of Technology campus policy officer.



Still at Large

The suspect still at large is said to be Dzhokar Tsarnaev, 19, a foreign national believed to have been in the country for more than a year, according to a federal law enforcement official.

The individual identified as the second suspect in the attack is his brother, who is 20, according to the official. The name of the brother, who was killed this morning by law enforcement, was not immediately available.

Jeff Bauman’s face-to-face confrontation with one of them may have yielded key clues in the manhunt, which intensified yesterday ater the Federal Bureau of Investigation released video images of two men.

While still in intensive care, Bauman gave the FBI a description of the man he saw, his brother said. Bauman’s information helped investigators narrow down whom to look for in hours of video of the attack, he said.

Video Released

In the images released yesterday, both men have on hooded sweatshirts under dark jackets; one is wearing a light-colored baseball cap turned backward on his head, while the other is wearing a dark baseball cap facing forward. Both are carrying large backpacks.