A French student was robbed of £500 during an attack by five youths in Shoreham.
The 17-year-old victim was surrounded by the gang in Gordon Road on Monday.
One of the youths grabbed his arms and he was forced to hand over his wallet containing the cash.
One of the youths was white, about 17, 5ft 10in, medium build and wearing a black woolly hat.
Anyone with information is asked to phone police on 0845 6070999.
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