Boston : City returns to normal after manhunt

Boston is returning to normal after one the biggest manhunts in US police history ended with the arrest of a teenager suspected of carrying out the marathon bombings. The entire city was under lockdown on Friday as police scoured the area for suspect Dzhokhar Tsarnaev, 19. He found hiding in a suburban backyard and arrested after an exchange of fire with police in which he was injured. His brother, Tamerlan, was earlier killed in a shoot-out with police. Three people died and more than 170 were wounded in Monday's bombings and a police officer was shot dead during the search.President Barack Obama has promised to seek answers on what had motivated the alleged bombers and whether they had help. 'Victims deserve answers' He said the arrest of the surviving suspect "closed an important chapter in this tragedy" but that there were many unanswered questions. "Among them, why did young men who grew up and studied here as part of our communities and our country resort to such violence? How did they plan and carry out these attacks and did they receive any help? "The families of those killed so senselessly deserve answers, the wounded, some of whom now have to learn to stand, walk and live again deserve answers,'' he added. The huge police manhunt began after 26-year-old police officer Sean Collins was shot dead in the Cambridge area. Shortly later a car was hijacked before a gun battle began further west, in Watertown. A transport police officer was seriously hurt and the elder brother, Tamerlan Tsarnaev, 26, was fatally wounded - doctors said he died in custody of bullet wounds and possible blast injuries from explosives strapped to his body. His younger brother fled by car. Early on Friday, police told residents to stay indoors as they scoured the district. The lockdown was lifted at 18:00 local time, then an hour later a huge gun fight broke out. It later emerged that a resident of Franklin Street in Watertown had found a seriously injured Dzhokhar Tsarnaev hiding in a boat in his backyard. Police say attempts to negotiate with him failed, and he was arrested after an exchange of fire.Dzhokhar Tsarnaev is being held under armed guard at the Bethesda Memorial Hospital, where many victims of the bombing are also being treated. 'Bittersweet' There were scenes of celebrations on the streets of Boston on Friday night. People cheered, honked car horns and waved American flags, and there chants of "USA". Elliot Friar, who lives close to where Monday's bombs exploded, said it was "a bittersweet moment" because of those who had lost their lives. "But it was also a time for celebration because the city has been on edge and we're finally feeling more safe than we have in the past four days," he told the BBC. The governor of Massachusetts, Deval Patrick, thanked the public for their "extraordinary patience and their participation in this investigation". "It's a night where I think we are all going to rest easy," he wrote on Twitter. The two bombs, which went off close to the finishing line of the Boston Marathon, killed three people: Martin Richard, aged eight, Krystle Campbell, 29, and Lu Lingzi, 23, a postgraduate student from China. In a statement, the Richard family said: "Tonight, our family applauds the entire law enforcement community for a job well done, and trust that our justice system will now do its job." Law enforcement officials and family members have identified the Tsarnaev brothers as ethnic Chechens who had been living in America for about a decade. The FBI had interviewed Tamerlan Tsarnaev in 2011 after a request from a foreign government, US law enforcements officials have confirmed. But agents closed the case after finding no cause for concern.Several members of the Tsarnaev family have condemned and disowned the brothers, but their parents have said that they could not have planned such an attack as they were being monitored by the FBI. Their mother, Zubeidat Tsarnaeva, said she was "100% sure that this is set up, insisting in an interview with Russia Today that her sons had never had any involvement with terrorism.