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A man was attacked from behind and punched before a gang of robbers stole his passport.
Police are now looking for witnesses after the robbery in Spital Street in Dartford town centre at around 9pm on Saturday.
The victim, a man in his 20s, is reported to have been approached by three men who took his passport from him, grabbed him from behind and punched him before running off in the direction of the High Street.
The three suspects are described as white; one being around 5ft 9ins tall with dark hair and dark clothes, another approximately 5ft 11ins with light-coloured short hair, and the third was wearing a black tracksuit.
Officers are appealing for anyone who witnessed the incident, or who was travelling in the area around that time and has dashcam footage, to call Kent Police on 01474 366149 quoting reference 46/6688/20.
Alternatively, you can contact the independent charity Crimestoppers anonymously by calling 0800 555 111 or using the anonymous online form at Crimestoppers-uk.org