Police are appealing for witnesses following a robbery at a shop in Haslington.
Shortly before 8.44pm on Thursday 12 September 2013 a man entered the Co-Op on Crewe Road in Haslington and selected a pint of milk. He then approached the counter and gave the cashier a £1 coin.
As the shop assistant opened the till he produced a 6 inch knife and leaned over the counter to take cash from the till. The shop assistant attempted to stop the man from taking the money, but the offender escaped with a quantity of cash.
The offender is described as white, 25 to 30-years-old and had an English accent.
He was wearing black trousers, a hooded top with the hood up and dark rimmed glasses.
A dark coloured Audi was seen in the area at the time, and enquiries are continuing to locate the car.
DC Andy Dixon said: "We are looking at the possibility that this is linked to the robbery at Bargain Booze in Gresty Road last week and the recent incidents in Macclesfield.
"We would urge anyone with information to contact police in order to help us with our enquiries."
DC Dixon added: "We would advise shopkeepers to be vigilant and report any suspicious activity to police."
Anyone with information should contact DC Andy Dixon on 101 quoting incident number 906 of 12 September 2013.
Alternatively information can be given anonymously by calling Crimestoppers on 0800 555 111.