Inside, officers found four men dead of gunshot wounds, Shea said.
Police identified them as Terence Bishop, 36; Dominick Wimbush, 47; Chester Goode, 37; and John Thomas, 32. All lived in Brooklyn.
Three wounded people were taken to hospitals with injuries that were not life-threatening, Shea said. One male was shot in the arm while another male survivor and a female were both shot in the leg, police said.A fourth person was also injured in the leg, while fleeing, but was not shot, Shea said at the news conference.
Police have no information on a suspect or motive, NYPD spokesman Brian Magoolaghan said.
Shea said police found evidence of gambling, with cards and dice inside the space, but no evidence of alcohol consumption. He said at least 15 people were present and 15 shots were fired. Two guns were recovered.
“At this point what it appears to be, is an illegal gambling location set up inside that first floor location,” Shea said.
Of the seven shot, two were from outside of New York City and the rest from Brooklyn, Shea said. They were all between the ages of 32 and 49.
Police have received no complaints in recent years about activity at the illegal spot, Chief of Patrol Rodney Harrison said.