Detectives from the Met's Flying Squad are investigating an armed robbery at a pub in Sutton.
The offence happened at about 22:00hrs on Sunday, 1 October at The HG Wells Pub, Cheam Common Road, Worcester Park, KT4.
A group of men wearing balaclavas and white overalls entered the pub, one carrying a handgun and others armed with knives
A member of staff was stabbed in the leg by one of the suspects.
He was later treated in hospital for his injuries; he was released after treatment.
No further injuries were reported.
Staff and some members of the public were locked in a room by the robbers, who attempted to remove the safe and then stole cash.
The suspects, who were described as black, then made off in a silver Vauxhall Astra.
No arrests at this early stage.
Any witnesses or anyone with any information is asked to call Flying Squad detectives 0208 785 8655 or contact via Twitter @MetCC.
To give information anonymously contact Crimestoppers on 0800 555 111 or online at crimestoppers-uk.org.