A 65-year-old woman was shoved onto the tracks at a Bronx subway station in an unprovoked attack Thursday afternoon, cops said.

The victim sustained a knee injury as she was hurled onto the railbed at the E. 180th St. station near Morris Park Ave. in West Farms around 1:47 p.m., police said.

Witnesses flagged down police officers at the station, who helped the victim back onto the northbound No. 2 and 5 trains’ platform.

Medics ferried the victim to St. Barnabas Hospital for treatment.

The attacker is still being sought.