Police are searching for four suspects who brutally beat a man on a Queens sidewalk in August. A fifth suspect has already been arrested and charged with attempted murder.

The incident occurred around 11:25 p.m. on Sunday, August 28th, outside 39-09 104 Street. Police say five male "individuals punched and kicked the 26 year-old male victim. Additionally they hit him with a bike chain and stabbed him with a knife."

The victim had puncture wounds to his stomach and a laceration on his head; he was taken to Elmhurst General Hospital in critical condition.

The NYPD described the suspects: one had a backpack and was last seen wearing a blue T-shirt, dark colored pants and dark colored sneakers; another was last seen wearing a white T-shirt and dark colored pants; a third suspect was last seen wearing a blue shirt with the number 72 on it; and the last suspect was last seen wearing a dark colored T-shirt and dark colored pants.

Police released images of the suspects, as well video of the assault:

Adan Rojas, 25, was already arrested. 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.