Police say the man and his son, whose names have not been released, were bound with duct tape. They say the suspect then shot the father in the abdomen and grazed the son's leg before fleeing.
Police are investigating whether the gunman followed the two victims from the father place of employment in Brooklyn or if he was waiting for them when they got off the train.
The father was listed in critical condition and his son was in stable condition at Jacobi Hospital.