CASH was stolen from the Tesco Extra superstore in Hucknall during an armed robbery on Tuesday night (March 13).
Three men entered the Ashgate Road store at around 10.45pm and assaulted a security guard with what police believe to be a metal bar.
They stole an undisclosed quantity of cash and then made off in a waiting car.
The store has been closed since and police are currently carrying out enquiries at the scene and reviewing CCTV footage.
The security guard suffered minor injuries.
A number of people seen near to the store around the time of the robbery have not yet come forward to police and may hold vital information.
Witnesses should contact Nottinghamshire Police on 101 or call Crimestoppers anonymously on 0800 555 111.