Two Staten Island brothers were fatally gunned down Sunday by a man determined to settle a score, police sources said.

Terrell Ford, 27, was shot in the torso and Justin Ford, 28, was shot in the back on Targee Street and Vanderbilt Avenue in Fox Hills around 3 a.m., cops said.

Terrell was rushed to Richmond University Medical Center where he was pronounced dead.

Justin was taken to Staten Island University Hospital North where he later died, cops said.

The unidentified gunman got into a fight with the brothers earlier in the night and returned to take care of unfinished business, police sources said.

No arrests have been made.