An 83-year-old man was found fatally stabbed in his Bronx apartment on Thursday, police said.

A man discovered his elderly father, Reynold Dobson, unconscious with multiple stab wounds to his torso on the bedroom floor of the Co-op City apartment on Bellamy Loop at about 4:30 p.m., sources said.

Dobson was pronounced dead on the scene, and a knife was recovered in the living room.

Cops did not immediately know whether anyone was being questioned in connection with the homicide.