The Massachusetts state police, aided by the Middlesex District Attorney’s Office, are investigating.

The Harvard Crimson reports.

Summer School Student Drowns in Charles River

A Harvard Summer School student who was recovered from the bottom of the Charles River Friday night was pronounced dead by drowning, according to the Massachusetts State Police.

The teenage male was identified as Tyler S. Greene, an 18-year-old from Georgia. Investigators believe the drowning was accidental, according to the Middlesex County District Attorney Marian T. Ryan.

Witnesses near the Weeks footbridge, where state police responded at around 8:45 p.m. Friday, reported seeing a male “go into the Charles River [and] come up with arms flailing and go under and not come back up” according to a press release. He was located about 25 minutes later by Cambridge Fire Department divers, and was transported to Beth Israel—a hospital in Boston—where he was pronounced dead, according to the release.