Arsonists struck several times in Doncaster overnight.
The ground floor of a derelict property was set alight in Norwood Drive, Bentley, at 7.20pm last night.
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Doncaster Central and Adwick firefighters spent about 30 minutes tackling the blaze.
A pile of litter went up in flames in Princess Crescent, Edlington, at 9.30pm.
A crew from Edlington Fire Station was called to the scene.
Yobs also set fire to a number of wooden pallets in Alexandra Road, Balby, at just after 1am this morning.
Edlington firefighters were again dispatched to deal with the blaze.
A pile of litter was set alight in Beaumont Avenue, Balby, at 5am.
Doncaster Central firefighters spent 20 minutes extinguishing the fire.