A man needed hospital treatment after being attacked in Worthing on Friday night.
The 27-year-old victim had been ejected from the Libertine bar in Portland Road and was stood outside when the assault took place at 11.35pm.
He was punched and kicked to the ground by at least two men, suffering cuts to his face and head and brusing to his body and an eye.
PC Nick Bartlett said: “If you can assist with identifying these offenders please email firstname.lastname@example.org or call 101 quoting serial 1816 of 12/8.
“Alternatively, call the independent charity Crimestoppers anonymously on 0800 555 111.”