A 15-year-old boy drowned Saturday night after a group of juveniles went swimming in a Rockville community pool that had already closed for the night, Montgomery County police said.

Hafis Kareem, of the 700 block of Monroe Street in Rockville, went underwater at one point and failed to resurface, police said. The juveniles called out to a person walking nearby who then called 911.

Officers responded to the New Mark Commons community pool in the 600 block of Tegner Way around 11 p.m., police said. A police spokeswoman said it was unclear how the teenagers got into the pool.

Officers performed CPR on Hafis before paramedics arrived, police said. The teen was then transported to Shady Grove Adventist Hospital, where additional efforts to revive him were unsuccessful and he was pronounced dead.

A police spokeswoman said there was no evidence alcohol or drugs played a part in the drowning.

Anyone with information about this incident is asked to call the Major Crimes Division at 240-773-5070.