VIDEO- BOSTON SUSPECT #2 CAPTURED ALIVE

                               

(CNN) -- The suspect in the Boston Marathon bombings was taken into custody Friday night, bringing to an end a massive manhunt in the Massachusetts capital amid warnings the man was possibly armed with explosives.

Law enforcement officials told CNN that authorities have confirmed the man in custody is 19-year-old Dzhokar Tsarnaev, who escaped an overnight shootout with police that left his older brother Tamerlan Tsarnaev -- the other man wanted in the bombings -- dead.

The younger Tsarnaev was in need of undisclosed medical care, the officials said.

After announcing the arrest on Twitter, Boston police tweeted: "CAPTURED!!! The hunt is over. The search is done. The terror is over. And justice has won. Suspect in custody."

The arrest came less than a week after two bombs exploded near the finish line of the Boston Marathon, shocking the nation and leaving a city on edge.

Tsarnaev was cornered late Friday on a boat in a backyard of Watertown, a suburb of Boston.

Authorities "engaged" the man, according to one of the officials who spoke on condition of anonymity, just minutes after authorities indicated during a news conference that a manhunt for the suspect appeared to come up empty.

A CNN crew near the scene heard about two dozen gunshots fired, but it was not clear if the shots were fired by the suspect, authorities or both. A number of small explosions, believed to be stun grenades, also were heard.

Authorities, using a bullhorn, called on the suspect to surrender: "Come out with your hands up.

The development came after authorities cast a wide net for the suspect that virtually shut down Boston and its surroundings following a violent night in which authorities say the brothers allegedly hurled explosives at pursuers, after killing Massachusetts Institute of Technology police Officer Sean Collier and hijacking a car.

Word of the arrest spread quickly in Boston, where residents cheered the news the suspect was in custody. Police cheered while some residents chanted: "Thank you. Thank you."

Mary Sullivan was walking her black Labrador earlier Friday night when gunshots rang out in her neighborhood.

"I'm glad it's over," she said. "The city and the people have gone through so much pain over these irrational decisions of these young men."
CNN.