THOUSANDS of pounds worth of straw was destroyed in a fire at March on Sunday night.
Graysmoor Drove had to be closed as fire-fighters were called at around 9.30pm to a blaze which destroyed 3,000 tonnes of straw.
The cause was not confirmed on Monday but police are appealing for information.
Det Insp Dave Murphy said: “I would like to hear from anyone who has any information about this fire or those responsible.”
The number to call is Crimestoppers, anonymously, on 0800 555-111.
Fire crews from March and Wisbech remained at the scene at various times throughout the night and a crew from Thorney kept a watch on the stack as it burned out.