A man was fatally shot early Saturday during a fight in the lobby of a Brooklyn apartment building, police said.

The victim, 28, had been arguing with an unidentified man just before 5 a.m. in the building on Rockaway Ave. near Livonia Ave. in Brownsville, officials said.

Emergency personnel called to the scene found the victim had been shot in his stomach and hand, police said.

The man was rushed to Brookdale Hospital, where he was pronounced dead.

His attacker fled toward the nearby Tilden Houses after the shooting and is still at large, police said.