STATEN ISLAND, N.Y. -- A quarrel between a mother and her boyfriend sparked a shooting that injured her two male relatives when they tried to intervene, police said.

The shooter remains at large on Tuesday morning, according to an NYPD spokesman. Police radio transmissions indicate that an evidence search is under way on Beach Street in Stapleton where the shooting occurred inside the home at about 10:15 p.m. on Monday.

A 37-year-old man suffered a gunshot wound to his left upper arm and a 15-year-old male was shot through right shoulder, police said.

They were shot after they overheard an argument between the couple and entered the room. The boyfriend took out a firearm and fired one round, striking both victims, a police source said. The suspect then ran from the residence.

Both victims are being treated at Richmond University Medical Center in West Brighton and are likely to recover from their injuries, according to the police spokesman.

The shooter is identified as a 47-year-old black male, wearing black jeans and a black hoodie, according to police radio transmissions.