A man was attacked outside a pub.
The 47-year-old had to be taken to hospital with a broken ankle.
Two women have been arrested following the incident at about 1.45am outside the QE2 pub in The Steyne, Bognor.
Police are appealing for witnesses.
Detective Constable Amanda Gamlin said: "We need to speak to anyone who was in The Steyne on Saturday and saw or heard any part of what happened.
"Please contact us no matter how small the amount of information you might have."
Two women, aged 42 and 45, were arrested on suspicion of wounding and have been released on bail until February 7.
Anyone with information should email 101@sussex.pnn.police.uk quoting serial 110 of 25/01 or contact Crimestoppers on 0800 555 111.
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