Staff at a supermarket were held up in a knifepoint robbery at the weekend.
The 6ft tall, gaunt-looking offender threatened a 31-year-old male cashier and a 22-year-old assistant before snatching a quantity of cash from a till.
The raid happened at 1.45pm yesterday at Waitrose in Western Road, Brighton, and police are appealing for witnesses.
There have been similar robberies on city-centre shops in recent days and police are warning all stores to be on their guard.
A spokesman said: "It is possible these robberies are connected. We are studying in-store CCTV footage from Waitrose and we are confident we will be able to identify the offender."
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