Police want to find these men after an unprovoked attack in Leeds city centre left a teenager with a broken jaw.
The 19-year-old man was attacked in Crown Street at about 4.20am on Saturday, May 17.
Detective Constable Michael Wimbles, of Leeds District CID, said: “The victim was left with serious injuries after what was a completely unprovoked attack by these men.
“I would ask anyone who knows the identify of any of them to contact us immediately.”
Some information has suggested the men could be from the Bradford area.
Anyone with information is asked to contact Det Con Wimbles or PC Rob Waite at Elland Road via 101 or call Crimestoppers, anonymously, on 0800 555 111.