80-yr.-old beaten on 6 train

A stranger repeatedly slapped an 80-year-old woman in an unprovoked attack on a train as it pulled into an Upper East Side station, cops said Tuesday.

The senior was on a southbound No. 6 train at the 68th Street-Hunter College station around 4:30 p.m. Saturday when the suspect hit her multiple times on her head, back and shoulder without saying a word, authorities said.

The attack caused the octogenarian to fall to the ground, cops said.

The suspect got off the train at the next stop, Lexington Avenue-59th Street, authorities said.

Video footage, which cops say was taken after the incident, shows the alleged assailant (above) leaving a large brown paper bag in front of one turnstile before jumping another. The bag’s contents were not known.

Police say the man is 40 to 45 years old, about 6-foot-2 and 170 pounds. He was last seen wearing a black shirt, black and red leather jacket, baggy jeans and red and black sneakers.