Officers have issued descriptions of three men seen acting suspiciously the night a stolen lorry was used to take a large amount of steel.
A white Ford Transit drop side lorry was taken from the yard of a business on the Nix Hill Industrial Estate, Alfreton, during the evening of 4th June.
The vehicle was then used to steal a large quantity of steel plating from a firm in Wood Street North, later the same night.
Three men were seen acting suspiciously in the Wood Street North area that night. One wore a red top, one a blue top and the third wore a yellow high-visibility jacket.
Anyone with information should call police on 101 or Crimestoppers on 0800 555 111.