Police are investigating a fire at a farm in Belper and the theft of a JCB machine from the premises.
The blaze, at Hill Top Farm, Openwood Road, Openwoodgate, was reported to the emergency services just after 6am on Tuesday.
It is being treated as suspicious and a joint police and fire investigation will be carried out to determine the cause.
The blaze involved a house and a garage.
The alarm was raised at 6.10am.
Fire crews from Belper, Duffield, Ripley and Crich were called.
A JCB was also stolen from the premises and police are appealing to anyone who saw it being driven away.
If anyone saw a JCB in the Belper area early on Wednesday morning they should call police on 101 or Crimestoppers on 0800 555 111.