Police were investigating whether human remains found along the shore of New York City's East River

could be those of an autistic teen who walked out of his school and

vanished more than three months ago, a law enforcement official said

Friday.

A person shooting photos discovered what looked like an

arm on Thursday, said the official, who had direct knowledge of the

case.

Police also found a torso and legs in the water, along

with a dark-colored shoe and clothes resembling what the boy was last

seen wearing, said the official, who was not authorized to speak

publicly and spoke to The Associated Press on condition of anonymity.

(AP)