Crews from Stanground and Dogsthorpe were called to a fire in Holme Fen Nature Reserve, Holme, at about 3.15pm. A spokesman for Cambridgeshire Fire and Rescue Service said: An area of 10m by 2m of peat was smouldering. Firefighters used shovels to dig around the peat then used a jet to put the fire out. Crews returned to their stations by 7.20pm. An investigation revealed that the cause of the fire was accidental.