Sussex Police has released a CCTV image in its investigation of an assault on a bus travelling from Brighton to Eastbourne in June.
A man was travelling on the number 12 bus towards Eastbourne when the incident took place, at around 3.30pm on Tuesday, June 5.
Police said while the bus was travelling between North Street and Madeira Drive in Brighton, the man was reportedly assaulted by the suspect, causing serious – but not life-threatening – arm injuries.
The suspect is described as a white man, of average build, in his mid-40s and with mousy brown hair.
Anyone who recognises the man or has any information on the incident is asked to report it online or call 101 quoting 926 of 05/06.
Alternatively, call Crimestoppers anonymously on 0800 555 111.