Police are appealing to shoppers who might have witnessed a woman running away from a robber.
Detectives are investigating a robbery at Tesco in Heanor in which a man threatened the victim with a jagged metal can.
The 28-year-old victim ran off into the Tesco supermarket car park and banged on the window of a car that was driving out, asking for help.
She then ran into the store and was helped by staff.
Police want to speak to the driver of the car. Does this incident ring a bell? Did you see the distressed woman running into the car park or the store? You might have information that could help us.
The robbery happened at about 11pm on February 4.
Witnesses or anyone with information should call DC Mark Woodcock on 101, quoting reference 17000050798.
Alternatively, send him a message online by visiting the Contact Us section of the Derbyshire Police website at www.derbyshire.police.uk/Contact-Us.
You can also call Crimestoppers on 0800 555 111.