BROOKLYN, N.Y. (PIX11) – Two men were found dead in an East Flatbush building after they were shot during an argument Sunday night, according to the NYPD.

Police were called around 10:40 p.m. to the building on Brooklyn Avenue near Farragut Road. A 47-year-old man and a 27-year-old man were discovered with gunshot wounds in the fourth-floor hallway of the building, according to authorities. One man was shot in the head and the other was shot in the torso, police said.

The two men were arguing when a third man intervened, police said. That’s when the third man allegedly fired at both of the men, according to authorities.

Officers found nine shell casings at the scene, police said.

The two victims are related and the suspect is believed to be a neighbor, police sources told PIX11 News.

No arrests had been made, as of Monday morning. The suspect was described as wearing a blue jacket, blue jeans, and boots.

The NYPD hasn’t identified the victims.

Submit tips to police by calling Crime Stoppers at 1-800-577-TIPS (8477), visiting, downloading the NYPD Crime Stoppers mobile app, or texting 274637 (CRIMES) then entering TIP577. Spanish-speaking callers are asked to dial 1-888-57-PISTA (74782).