Arsonists are believed to have set fire to a barn in Wilburton on Tuesday.
Crews from Cambridge, Cottenham, Ely and Chatteris, alongside a crew from Newmarket in Suffolk were called to the blaze at 7.40am on September 3.
Firefighters arrived to find a barn on fire. They used hose reels, a turntable ladder and a water carrier to extinguish the fire.
They returned to their stations by just after 11am but returned throughout the day to reinspect and dampen down the area, making the area safe.
The cause of the fire is believed to be deliberate.
Anyone with information should contact police by visiting www.cambs.police.uk to submit an online report or call Crimestoppers on 0800 555111.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here