A robber struck again in a brazen raid on a busy shop.

Detectives are offering a reward for help catching the suspect, who is believed to have carried out a string of crimes over the last month.

He walked into a Co-op store in Broadwater Road, Worthing, on Saturday night carrying a kitchen knife and forced staff to empty their safe of hundreds of pounds.

Sussex Police are linking the raid to several at Co-ops, betting shops and other stores in the town.

They believe the man is local because of his knowledge of the businesses and are appealing for anyone who knows who he is to contact them.

They are warning the public not to approach him and to dial 999 if they spot him.

Last week police offered a £500 reward for information leading to the arrest and conviction of the suspect.

Anyone with information is asked to call Worthing CID on 0845 6070999, quoting Operation Sheridan, or Crimestoppers anonymously on 0800 555111.