Police in New Haven say a single gunshot was fired inside The Cheetah Club on East Street in the city just before 1:30am Sunday.
Officers were patrolling a nearby parking lot when they heard the gunfire and entered the club.
Police found 22-year-old Torrance Dawkins of Waterbury fatally shot. Authorities say Dawkins birthday was Saturday.
At the time, police say the club was hosting a hip-hop party.
A suspect has not been identified at this time. Anyone with information is urged to contact New Haven police.