A young man's body was pulled from a Massachusetts reservoir Wednesday evening.
Crews responded to the Stony Brook Basin Reservoir in Waltham to search for a 20-year-old man who had gone missing.
The call came in just after 5:30 p.m., at which point the man had been missing for five to 10 minutes.
Two hours later, divers found the victim's body in the reservoir. State police say he drowned.
The victim, a Waltham resident, was swimming with two friends when they lost sight of him. His identity has not yet been released.
The reservoir, which spans Waltham and neighboring Weston, is about 32 feet deep at its deepest location. It is filled with about 400 million gallons of drinking water, which it provides for Cambridge.
The reservoir's caretaker says it is illegal to swim there, but that it's a daily occurrence.
State and local police are investigating the case alongside the Middlesex County District Attorney's Office.