A man allegedly rubbed up against a 21-year-old woman and grabbed her buttocks on the No. 7 train, police said.
The incident occurred on Dec. 10 at 3:38 p.m. when the train was at the 74th Street and Roosevelt Avenue station, according to the NYPD.
After he groped the woman, the suspect then fled at the Main Street station in Flushing, cops said.
Police describe the suspect as a white male, 5 feet 10 inches tall and 200 pounds.
Anyone with information is asked to call Crime Stoppers at (800) 577-TIPS (8477). The public can also submit their tips by logging onto the Crime Stoppers website or can text their tips to CRIMES (274637), then enter TIP577. All calls are strictly confidential.