Police want to trace the man pictured in these CCTV images after two women were assaulted on a night out in Leeds.
They said one of the victims was punched by the man during an argument in Lower Briggate in the city centre.
The 24-year-old woman was left with a fracture to her cheekbone.
Her friend, also 24, was assaulted as well and suffered bruising and swelling to her face and hand.
A West Yorkshire Police spokesman said: "The suspect was with a woman who is shown in the images and who officers also want to identify as someone with information that can assist the investigation."
The assaulted happened in the early hours of Sunday, April 23.
Anyone who recognises either of the people pictured asked to call Detective Constable Louise Lavers, of Leeds District CID, via 101 and quote crime number 13170181836.
Information can also be passed on to the independent charity Crimestoppers anonymously on 0800 555 111.