Inspector Alan Swann said: “We received a report around 3:10 am that a man, aged in his thirties, had been assaulted by two men in the Donegall Place East area.
“The victim sustained facial injuries and later attended hospital for treatment.
“The attackers are described as being aged in their late teens, or early twenties, and of slim build.
“One of the suspects is described as having long, unkempt hair and wore a white baggy, long-sleeve T-shirt, green/khaki baggy trousers and white shoes.
“The second suspect is described as having short hair and wore a dark-coloured flowery T-shirt, dark skinny trousers and light-coloured trainers.
“The second suspect may also have worn or carried a yellow hooded top or jacket.
“I want to appeal to anyone who was in the area and may have witnessed the assault, or who knows anything about this incident, to get in touch with us.
“I am also particularly keen to identify a witness who is believed to have filmed this incident on a camera phone.
“Anyone with information they believe could assist our investigation is asked to call officers at Lisburn Road on 101 quoting reference 206 06/01/19.”
Alternatively, information can be provided to the independent charity Crimestoppers on 0800 555 111, which is 100% anonymous and gives people the power to speak up and stop crime.