Police would like to identify this person following two robberies at shops in Leigh-on-Sea on Tuesday January 14.
A teenager holding a knife threatened staff in Eastwood Convenience Store, in Rayleigh Road, at around 7.30pm before carrying out a robbery in Cambridge News, in Eastwood Road North, just before 8pm.
The suspect left the scene with cash.
Detective Constable Glen Crosby, of Southend CID, said: “Fortunately no one was injured but the victims were left shaken by their ordeals.
“We would like to locate the person pictured on CCTV.
“We understand there were people waiting outside and we are trying to establish whether they are witnesses or suspects.
“We would urge anyone with information to call Southend CID on 101 quoting incidents 1019 and 1056 of 14/01.”