A fire at a barn in Derbyshire which killed two horses could have been started deliberately, police say.
The barn and a stable block were destroyed in the blaze in the early hours of Sunday at Stoney Clouds Farm, Larch Drive, Sandiacre.
Two horses in the stable were killed, while a further two were rescued by firefighters.
Anyone with any information about the fire has been asked to contact Derbyshire Police.
A force spokesperson said: "Police and fire service have begun an investigation into the cause of the fire, which at this stage is being treated as suspicious."