A number of fires were started deliberately in Grantham on Sunday evening.
Lincolnshire Fire and Rescue says the arson task force team, a collaboration between the fire service and the police, is investigating the fires which were started around 9pm in the town centre.
The first incident happened just before 9pm when a crew extinguished two wheelie bins on fire in Elmer Street North using one hose reel. The second incident took place about 20 minutes later in Watergate where a crew put out one wheelie bin on fire.
Just after 9pm a second Grantham crew was called to Commercial Road where it used a hose reel and one main jet to extinguish a skip fire.