A man was sexually assaulted by another man as he walked home in the early hours of the morning.
The 20-year-old victim, from Brighton, was in Hartington Road, Brighton, when he was attacked.
Detectives were still talking to the victim to determine what happened.
He reported the crime on Sunday and told officers the attack happened the previous day at 6.30am.
The suspect was 25, more than 6ft, of athletic build with short blond, possibly bleached hair.
He wore light-coloured trousers, a red nylon sports jacket with white stripes.
Anyone with information should call Detective Constable Jody Morris at Brighton CID on 0845 6070999.
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