A man armed with a knife snatched cash and top-up vouchers during a raid on a mobile phone shop.

The robber threatened a member of staff with the knife after walking into the Phone Zone in the High Street, Littlehampton.

Police said he demanded money and top-up cards which he ordered staff to put in a bag he placed on the counter.

The man is said to be about 35, 5ft 3in with dark wavy hair and a goatee beard.

He was wearing a dark woolly hat and black padded jacket during the raid at 3pm yesterday .

A spokeswoman at the shop declined to discuss the robbery but said: "No one was hurt."