A Watertown man has died after he was allegedly pushed into the Charles River on Tuesday afternoon by a friend.

Mitchell Harrison, 26, was pronounced dead late Tuesday night at Brigham and Women’s Hospital, WHDH reported. He had been taken to the medical facility shortly after 5:20 p.m. after dive crews pulled from the Charles River.

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Authorities believe Harrison and an acquaintance were drinking on a recreational dock when the victim either fell asleep or passed out and was then pushed into the water, according to Fox25.

A bystander reportedly jumped into the water to try to save Harrison but was unable to pull him out, WHDH added.

Malden resident Lenny Quintero-Flores, 27, was arrested and initially charged with assault and battery causing serious bodily harm, Fox25 reported. Following Harrison’s death, charges against Quintero-Flores were upgraded to include manslaughter.

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The suspect was held on $100,000 cash bail and was scheduled to be arraigned on Wednesday in Charlestown District Court, according to WHDH.