Detective Sergeant Hannah Wright, of North Yorkshire Police said:
"If you witnessed the robbery or can help identify either of the people involved I urge you to come forward and contact the police or Crimestoppers straight away.
"I am particularly keen to speak to anyone who may have seen the two suspects after they left the store or saw anyone acting suspiciously prior to the robbery."
More top news
Asbestos fly tipping has doubled in the last nine months costing over £10,000 according to Northumberland County Council
Paramedics tried to save Parminder Dhinsa by performing open-heart surgery by the roadside but the mum-of-two later died in hospital
Terrified children were in the shop when a masked Peter Reynolds burst in brandishing what staff thought was a shotgun