Two men armed with a hammer and a spanner stole money and cigarettes from the Co-op in Brixworth on Monday night.
The men went into the store in Hunters’ Way just before 11pm.
They took the till and a quantity of cigarettes. The till tray was later found in Lessen Road.
The first man was white, about 6ft 2in, of stocky build, in his late 20s or early 30s. He had his face covered and was wearing dark clothing.
The second was white, about 5ft 9in, of medium build, in his mid 20s, wearing a white hooded top with three black stripes on the hood and a navy jacket.