Sussex police said during the Black Lives Matter protest event on Saturday June 13, a 49-year-old man was at the junction of Castle Square and the Old Steine when he was punched to the ground at about 2.20pm.
A spokesman added: “The man, who was not connected to the protest, suffered serious injuries and was taken to hospital for treatment. Whilst his injuries were not life threatening, he did have to undergo surgery.”
Detective Inspector Ian Still said: “As part of our enquiries into this assault, we would like to speak to a man who is pictured in the image.
“If it’s you or anyone can help us identify the man please come forward and get in touch with us.”
The man is described as being aged in his 20s, over 6ft, of athletic build with close cropped hair. He was bare chested and was wearing black tight jogging trousers. He has also been described as having a tattoo across the top of his back from one shoulder blade to the other which looks like the wings of a butterfly.
The spokesman added: “Anyone with any information who can help the investigation is asked to report online or ring 101 quoting serial 472 of 13/06.”
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