A 70-year-old man was held at knifepoint in an attempted robbery at Costcutter in Baylis Road at 5.40am on Friday 30 January.
The man was shopping for groceries when he was grabbed from behind and the suspect put a 4" knife to his throat. The suspect then shouted to the shop assistants to give him money. They hit the panic alarm, at which point the suspect ran off onto the Millennium Green opposite and then into the Tansworth Estate.
The victim went after the suspect despite requiring a walking stick. He was not injured in the attack and no property was stolen.
The suspect is described as a light skinned black male, 19-20 years old, 5'10" tall and of stocky build. He was wearing a brilliant blue top and a light blue scarf to cover the lower part of his face.
Detective Constable Paul Donoghue said: "This was a particularly hideous and unprovoked attack on a senior citizen going about his daily business, thankfully he was not injured. This type of violence towards a member of the public is rare and we need to catch this dangerous man. Anyone with information should contact Kennington Priority Crime Unit on 020 8649 2434 or call Crimestoppers anonymously on 0800 555 111."