The injured woman, who told police that she did not know her attacker, was taken to Bellevue Hospital with a 4-inch laceration on the left side of her face.
The NYPD described the suspect as a light-skinned black or Hispanic 18-year-old man, wearing a red sweater and black sneakers, the Daily News reported. He reportedly fled the scene on board a southbound D train leaving the Broadway-Lafayette station.
Police released a sketch of the suspect... and noted that the attack happened on a downtown D train entering the Broadway-Lafayette station... and not the 6 arriving at Bleecker as originally reported in media outlets yesterday...
Gothamist has an update with video surveillance footage and relevant links here.
Anyone with information that could help in the investigation is asked to call Crime Stoppers at 1-800-577-TIPS (8477). You may also submit tips online.
Police arrested 21-year-old Damon Knowles, of Brooklyn, in the assault.