A 21-year-old man was slashed in the back by strangers on a Queens subway platform early Sunday, cops said.

It’s unclear whether a dispute sparked the attack or if it was random, police said.

The victim was on a Manhattan-bound No. 7 subway platform at the Roosevelt Avenue and Junction Boulevard Station in Corona around 1:30 a.m. when he was slashed twice in the back, cops said.

He told cops there were three attackers and that he didn’t know them.

He was taken to Elmhurst Hospital in stable condition, cops said. Cops were looking for video and the suspects.