CCTV footage shared by Metropolitan Police of a knifeman threatening a woman and her child.
Police are now on the hunt to trace two suspects after a robbery in south-west London.
Officers say the victim, 22, was at home in Wandsworth when two men knocked on her door and forced their way in at 1.24pm on Tuesday 15 November.
Footage shows her being forced into the kitchen at knifepoint by a man with his hood up and wearing a blue jacket from the supermarket giant.
He demanded cash before he and his accomplice fled, Scotland Yard said.
Nothing is believed to have been taken and there are no reports of injuries.
Detectives from the South West Command Unit are investigating.
Met Police are now appealing to trace the two suspects.
Detective Sergeant Cerith Jones said: “The community will be appalled by this awful incident and I know many people will want to reach out and help us identify them.
“I urge local people to please check your doorbell and dash cam footage for any material that could assist us. If you were in the vicinity and saw two men acting suspiciously, or running away, we want to hear from you.
“The young woman was terrified and it is imperative that we catch the men responsible.”
The Met said officers will be conducting extra patrols in the area over the coming days.
Anyone with information is asked to call 101 or tweet @MetCC with the reference CAD 3421/15 Nov.
Tesco has been approached for comment, but has yet to respond.
Want a quick and expert briefing on the biggest news stories? Listen to our latest podcasts to find out What You Need To Know...