FIRE extinguishers were taken from a sports centre as teams played on its pitches.
Police said two men, in their late teens or early 20s, went into Helford Road Pavilion, in Peterlee, while games were under way and took the two extinguishers.
They also tried to get into changing rooms, but they had been locked.
Police are appealing for help to track them down and say people in the Oakerside area of the town may have spotted the men carrying the equipment through the estate.
The theft happened at around 11am last Saturday.
Anyone with information is asked to contact Durham Constabulary on 101 or Crimestoppers anonymously on 0800 555 111.