Three men were killed in a shootout early Sunday morning, police said.

Police believe the shooter, caught on surveillance video, to still on the loose by Sunday evening.

It's unclear what led up to the shooting at around 1:30 a.m. at the Ingersoll Houses in Fort Greene that left the three men dead.

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Cops arrived at 58 Fleet after reports of shots fired, where they discovered Calvin Clinkscales, 43, of Queens on the floor and shot in the head.

Near Clinkscales body was Lacount Simmons, 39. A resident of Ingersoll Houses, Simmonsw as also found with a gunshot wound to his head.

Authorities said Herbert Brown, 76, was also found bleeding at the scene, but from a gunshot to his abdomen.

Both Clinkscales and Simmons were pronounced dead at the scene.

Paramedics soon arrived and rushed Brown — who also lived at Ingersoll Houses — to Methodist Hospital, where police said he died soon after.

Grainy surveillance video shows the suspect standing in front of a row of bins before he walked towards another person, after which various people scattered from the location.

Investigators ask that anyone with information regarding the suspect or shooting call the NYPD's Crime Stoppers Hotline at 800-577-TIPS or text tips to 274637 (CRIMES) then enter TIP577.