Arsonists torched a car in Denby causing damage to another vehicle nearby.
Fire crews from Ripley were called to Derby Road at 1am on Saturday after reports a Vauxhall Astra parked on a patch of private land near a home was in flames.
Two firefighters tackled the blaze using water hoses and breathing backpacks. A second car nearby was also heat damaged.
Police were also called to the scene as the cause as the flames were believed to have been caused deliberately.
If you saw anything which could help police, call the force on 101.