Police are investigating an aggravated robbery in Hamilton which happened shortly after midday today.
Four males, believed to be youths, entered the store on Bankwood Rd and presented what appeared to be an imitation firearm at a staff member and demanded money.
The shopkeeper refused to hand over the money and was punched in the face.
"Police are supporting the victim who is understandably shaken by the event," detective Sergeant Nicola Cornes said.