A 52-year-old woman was punched in the face by an unknown assailant while walking her dog in Chelsea last night.

The NYPD says that at around 10:05 p.m. on Sunday, the woman was walking her dog on West 15th Street near 7th Avenue when police say a man "became aggravated," yelled at her and threw an "unknown object" at her.

He then punched her in the face before fleeing westbound on West 15th Street.

The victim suffered a fractured nose, but was not treated at a hospital.

Police say the suspect, pictured here, was last seen wearing a baseball cap, jacket, pants and sneakers.

Anyone with information in regards to this incident is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782).

The public can also submit their tips by logging onto the Crime stoppers website or by texting their tips to 274637 (CRIMES) then enter TIP577.

All calls are strictly confidential.