Police are looking for a man they say stabbed another straphanger several times in his buttocks on a Queens subway platform Sunday evening. View Full Caption DNAinfo/Nikhita Venugopal

QUEENS — A man was stabbed in his buttocks several times by another straphanger on subway platforms in Forest Hills and Kew Gardens Sunday evening, but told police he was not aware of it until he returned home.

The man was waiting for a Jamaica-bound F train at the 71st/Continental Avenue station in Forest Hills around 7:10 p.m. when he said another passenger bumped into him, according to to the NYPD.

The victim, who said his attacker was wearing a red and black checkered coat and black pants, said the man followed him when he got on the train and then when he got off at the Union Turnpike-Kew Gardens station, where the victim told investigators the man “bumped into his buttocks” several more times, authorities said.

The victim said he did not know the assailant and no dispute preceded the incident, according to police.

He also said that initially he felt no pain and did not realize that he was actually stabbed until he went home and saw blood on his pants.

He then discovered three puncture wounds to his left buttock and one to his right buttock, each of them about half an inch wide, police said.

The victim reported the incident and was taken to Forest Hills Hospital in stable condition, police said.

It was not immediately clear what tool was used to stab the man.

Police officials said they are not sure why the attack occurred or what the motive was.

No arrests had been made as of Monday morning.