Police are appealing for information after a man robbed a Fieldway newsagent early on Wednesday morning (October 8).
The man approached a member of staff shortly after she arrived to open the McColl's newsagents in Wayside, Fieldway at 4.45am and forced her to open the shop's safe, before making off with cash.
No weapons were seen or used during the incident, and the worker was not injured.
The suspect is described as a black man, approximately 5ft 8ins tall, of large build, wearing a full face mask, dark trousers and dark shoes, with a dark green, knee-length jacket with a fur-lined hood.
Investigating officer, Detective Constable Billy Clough, from Croydon CID, said: "I'm appealing to anyone who may have been up and about at that early hour yesterday morning to think back if they saw anything or anyone acting suspiciously in the Fieldway area.
"Although no weapon was seen or used in yesterday's robbery, it has clearly left the victim shaken up and we are determined to try and identify the person responsible.
"I'd urge anyone with information to get in touch with police, or if you want to remain anonymous, call the Crimestoppers charity."
A similar robbery happened on September 29 at the nearby McColl's newsagent in Headley Drive, New Addington and DC Clough added the force were "keeping an open mind" as to whether the two are linked.
Anyone with information should call Croydon CID on 101 or contact Crimestoppers on 0800 555 111.