Firefighters from Worksop attended a fire at a derelict building on Canal Road in Worksop at 7:19am this morning.
They used a hose reel to extinguish the blaze and investigated the building for damage.
Just a few minutes later the fire crew were called to a rubbish bin and lamp post on fire on Beaver Lane in Worksop.
A hose reel was used to extinguish the fire.
It is believed that the fires were started deliberately and the firefighters are currently liasing with police.