More than 60 firefighters tackled a deliberate blaze at a disused office block in Gamlingay yesterday (July 5) - but no one was injured.
The fire took place at the two-storey building on the industrial estate on Green End just before 5pm.
Plumes of smoke could be seen for several miles as crews from Gamlingay, Cambridge, St Neots, Kimbolton, Papworth and Huntingdon, along with crews from Bedfordshire and Hertfordshire attended.
They left the scene at 3am this morning (July 6).
Residents were advised to keep their doors and windows shut.
A Cambridgeshire Fire and Rescue Service spokesperson said: “The site has been reinspected since, and will be inspected again later this afternoon to check for any hotspots.
“There were no casualties reported.
“The cause of the fire is believed to be deliberate.”
Firefighters worked to contain the fire and prevent it spreading to neighbouring derelict domestic buildings.
The water carrier from Ramsey, aerial appliances from Cambridge and Bedfordshire and the incident command unit from Huntingdon were also called.
Anyone with information about the incident should contact police by visiting www.cambs.police.uk to submit an online report or call Crimestoppers on 0800 555111.