Hundreds of Northeastern University students gather in Hemenway Street to celebrate the capture of suspected Boston Marathon bomber Dzhokhar Tsarnaev in Boston.

As news spread that the police had captured Dzhokhar Tsarnaev, the second man suspected of setting off two bombs on Monday at the Boston Marathon, killing three and injuring 176, the streets of Boston and Watertown erupted into thunderous applause and cheers.

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People cheer as police drive down Arlington street in Watertown, Massachusetts

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Neighborhood residents cheer to news that police have captured Dzhokhar Tsarnaev, the surviving suspect in the Boston Marathon bombings, in Watertown, Massachusetts.

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People wave US flags while cheering as police drive down Arlington street in Watertown, Massachusetts.

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Members of the public cheer as police officers leave the scene where Dzhokhar was taken into custody in Watertown, Massachusetts.

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U S President Barack Obama walks from the rostrum after making a statement from the briefing room of the White House in Washington, following the capture of the second Boston Marathon bombing suspect.

Obama pledged on Friday that the United States will find out whether the two brothers suspected of carrying out the Boston Marathon bombings received help.