Police have launched an appeal to track down a robber who knocked down a 92-year-old in a "sickening" attack captured on CCTV.
The elderly man has been left in fear for his safety after being targeted in the communal area of a block of flats in Westminster, central London.
He was pushing a small trolley on his way home from a shopping trip when a man aged between 20 and 30 followed him in to Ingestre Court foyer.
The attacker then shoved over the pensioner and stole his wallet, which contained only £5.
CCTV shows the pensioner lying on the floor at the feet of his attacker, who has the stolen wallet in his hand. The victim lay prone on the ground for five minutes before he was able to get back on his feet.
The senior citizen - who lives alone - has continued living in his home following the attack.
Police have appealed for information to trace the robber responsible for the "callous" attack. He is described as black, between 5'10" - 6' tall and of slim build.
Detective Sergeant Gemma Alger of the Westminster Serious Crime Unit said: "This is a totally unprovoked, callous and sickening assault on a defenceless pensioner.
"The victim is fiercely independent and has lived in London all his life. His confidence has been eroded as a result of the actions of this individual and now he is fearful about going out.
"I would urge anyone who has any information on who was responsible to contact us as soon as possible before he targets someone else."
Call 020 7321 7513 with information. Alternatively, call 101 and quote reference 6504926/15.