Firefighters from Chesterfield were called out to a series of deliberate hedge fires over the weekend.
Crews attended three separate incidents of conifers being set alight on Hucklow Avenue, Grindlow Avenue and Brecon Close on Saturday night.
A fire service spokesman said police had been informed.
Firefighters from Alfreton and Chesterfield were called to a vehicle fire on the M1 northbound in the early hours of Sunday morning, involved a car alight which between junctions 28 and 29.
The fire was out when fire crews arrived on the scene.
And firefighters from Chesterfield and Staveley were called to a fire in a two-storey semi-detached house on Brockwell Lane in the early hours of Sunday. Nobody was injured and firefighters put out the small blaze.