SHIRLEY, N.Y. (CBSNewYork) — A 4-year-old boy drowned Saturday night in a swimming pool at a backyard barbecue in Shirley, Long Island.

Justin McConville was found at the bottom of a 4-foot above-ground pool at 7:11 p.m., police said. The boy was pulled from the pool, and the family started to perform CPR until an ambulance arrived.

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Justin was rushed to Brookhaven Memorial Hospital Medical Center in East Patchogue, where he was pronounced dead.

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The barbecue was being hosted by friends of the boy’s mother at 44 Alcolade Dr. East

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Police are investigating.