A 35-year-old livery cab driver was fatally gunned down in Brooklyn early Monday, cops said.

The victim, Naji Fawaz, was found unconscious and unresponsive in the front seat of his livery cab on Decatur Street near Patchen Avenue at about 12:20 a.m. in Bedford-Stuyvesant, according to police.

EMS rushed him to Kings County Hospital but he was pronounced dead a short time later, authorities said.

A trail of blood was found at the scene and investigators are still trying to determine a motive, sources said.

Fawaz, of Brownsville, had no prior arrest history.

He was about a 10-minute car-ride away from his home.