It happened around 8 p.m. inside Professional Dry Cleaning on Courtlandt Avenue.
During the robbery, police say one of the three suspects threw a stool at the 46-year-old male employee which caused a laceration to his ear. The suspects fled the store with an undetermined amount of coins.
The victim was transported to Lincoln Hospital with minor injuries.
The first man was described as 22 to 25 year old, 6'2", 200 pounds, armed with a hammer; last seen wearing a black mask, black and white striped long sleeve shirt, black shorts and black and white sneakers.
The second man is described as 22 to 25 year old, 6'1", 220 pounds, carried a black backpack; last seen wearing a black du-rag and dark colored clothing.
The third man was described25 to 25 years old, 6'0, 175 pounds; last seen wearing a red hooded sweater, black pants and black 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 at WWW.NYPDCRIMESTOPPERS.COM or by texting their tips to 274637 (CRIMES) then enter TIP577. All calls are strictly confidential.