A Brighton man was punched so hard in the face that he had to be taken to hospital.
Sussex Police has urged witnesses to contact them about the attack in Halland Road, Moulsecoomb, in the early hours of Tuesday 18 May.
Two men came up to the 23-year-old victim from behind and punched him several times by the Bolney Road bus stop.
Police say that just after the attack – at 2.40am – a man walked towards the victim from Bolney Road. He was alone. Detectives want to speak to him.
Anyone with information about the attack – which has only just been made public – can contact Sussex Police on 0845 6070999.