Authorities say a Bronx teen was fatally shot today by police who were attempting to make a narcotics arrest.The incident happened on East 229th Street between Barnes Avenue and White Plains Road.Police say Ramarley Graham, 18, was fatally shot in the torso in the bathroom of his home while a narcotics unit was about to make an arrest. He died at Montefiore Hospital shortly after arriving, officials say.According to investigators, Graham was shot after a brief chase with police. He was unarmed, they say.It marks the third time in a week that a criminal suspect has died at the hands of city police, officials say. Some upset members of the community took to the streets tonight to voice their displeasure.Graham's parents say they don't believe that "something went wrong" during the arrest. They say they're demanding answers from police officials.