A body found in the Charles River this morning is of missing graduate student Jonathan Dailey, the Suffolk district attorney's office said this afternoon.
Authorities said they confirmed the identity through dental records.
A cause of death has not yet been determined.
"The facts and circumstances surrounding Mr. Dailey's death remain under investigation by state police detectives assigned to the Suffolk DA's office," said a statement from the Suffolk district attorney's office. "We rule out no possibility and we promise Mr. Dailey's family a thorough, comprehensive search for the truth as we investigate his death."
State police responded to an area near the Boston University bridge about 8 a.m. this morning.
As members of the state police marine unit pulled the body on to their boat from the water, it appeared that his feet were attached to a chain that was looped through a cinder block.
Authorities said they would not comment on evidence found at or near the scene while it is being investigated.