Police are appealing for information after diesel was stolen from a parked lorry on Croespenmaen Industrial Estate.
The fuel was stolen from the lorry, parked in a layby, overnight between 5pm on Monday, January 11 and 8am the following morning.
Sergeant Mark Thomas said patrols in marked and unmarked police cars are being stepped up in the area and warned thieves of the danger of stealing fuel.
Anyone with information can call Gwent Police on 101 quoting log 46 12/1/16.