A motorcyclist has been struck with a baseball bat by the driver of a grey Mini following a collision between the two vehicles in Worthing.
Police were called to Richmond Road shortly before 10.15pm on Wednesday night.
The driver of the car had got out of his vehicle and struck the rider before driving off.
Police said the victim is not thought to have been seriously hurt.
The car driver has been described by witnesses as a man in his 20s, of Middle Eastern or Asian appearence, between 5′ and 6′ tall, with short cropped hair, a dark beard, and wearing a dark sports jumper.
Anyone with information about the incident is asked to report details online here, or phone 101, quoting reference number 1309 of 31/01.