NEW HAVEN — Police arrested a 71-year-old man who called 911 Sunday to report that he had shot another man who tried attacking him with a knife.

Anthony Anamasi, of 25 Donna Drive, is charged with first-degree assault, said Officer David Hartman, police spokesman.

Hartman said officer responding to the call found Leroy Brown, 23, a resident of another apartment in the complex on Donna Drive, with a gunshot wound to the side of his head. Brown was found in a common hallway of his apartment building, and was taken by ambulance to Yale–New Haven Hospital for treatment.

Brown remains in critical condition, police said Monday.

Hartman said Anamasi was cooperating with police in the investigation. Anamasi has a valid state gun permit and the weapon used in the shooting is properly registered, Hartman said. Police have seized the weapon.