Police are investigating an armed robbery at a bureau de change.

A man walked into Dapa Forex in Western Road, Brighton, and showed staff a gun before demanding money and making off with cash.

Police were called at 1.25pm on Wednesday.

The suspect was described as black, in his 20s, about 5ft 9in, medium build, with short to medium-length dark hair.

He was wearing a dark, hooded thigh-length coat.

The raid follows two robberies at Sweets and Things newsagents in Western Road, Hove on August 13 and Preston News in Preston Road, Brighton on August 19.

Anyone with information is asked to call Brighton and Hove CID on 0845 6070999 or Crimestoppers on 0800 555111, quoting Operation Greenway.