A man was allegedly assaulted outside a seafront cafe.
Police are appealing for witnesses following the incident which occurred outside Whitecliffs cafe on Marine Drive, Saltdean, between 6.40pm and 6.50pm on June 19.
A man was sitting on a wall outside the café when a white van reportedly reversed close to him, police said.
After a verbal altercation between the driver and the victim, police said the victim was reportedly punched several times by the driver.
The suspect is described as a man of mixed ethnicity, around 6ft tall, of slim build, bald, with no facial hair.
He was described as smartly dressed, wearing black trousers and a light-coloured jacket.
The vehicle involved is believed to be a white Volkswagen Transporter van.
Police are looking to speak with anyone witnessed the incident, has dashcam footage, CCTV, or any information that may help with their enquiries.
Anyone with information is asked to contact police online or by calling 101, quoting reference 47260147925.
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