A Barnard College student was slashed by a stranger outside a Morningside Heights dorm building last night, according to cops and a report.

The attacker sneaked up on the 21-year-old woman and cut her behind the ear as she walked in front of the suite-style Barnard residence hall on West 116th Street near Claremont Avenue around 8:15 p.m., police said. 

She was taken to Mount Sinai Medical Center, where she is listed in stable condition.

The 21-year-old victim was slashed behind the ear as she walked in front of the Barnard dorm building on West 116th Street near Claremont Avenue. Google Maps

Barnard students received an email confirming the victim is a “member of the Barnard community,” The Columbia Spectator reported. 

Student Eva Kates told the university newspaper she was walking home when she saw the victim and the heavy police response. 

“I originally thought that someone had robbed Morton Williams and I was like, ‘Wow, they have a lot of police officers for that,’” Kates said. “But then I saw a girl, and she had blood on her neck.”

The victim was outside the suite-style residence hall when she was attacked by a stranger. Google Maps

Texts received by students at the neighboring Columbia University described the suspect — who fled the scene — as a “dark skin male, 5-foot-9, stocky build wearing a black hooded coat with a yellow hat underneath and tan pants,” according to the report. 

No arrests had been made by Friday, and the motive for the assault remained unknown.