Neighbourhood Insp Lisa Musgrove, of the Sunderland Neighbourhood Policing Team, commented that a robbery at William Hill bookmakers in Sunderland was an isolated incident. She said: "Thankfully the member of staff was not seriously injured. We've been following a number of lines of inquiry to find those responsible and are now releasing CCTV footage in the hope members of the public can help us." She added: "We know that one of the men has Lidl shopping bags over his shoes but would ask anyone who may know the brand of clothing or where it could have been bought from to contact us."