Spate of suspicious fires at Maltby
The first was at 2.30am when a portable cabin was set alight on Blyth Road. The blaze spread to three vehicles.
South Yorkshire Fire & Rescue confirmed it had been started deliberately and police are examining CCTV.
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Hide AdFifteen minutes later, crews were called to Millicent Square after a campervan fire spread to a house.
Firefighters spent 90 minutes cooling two propane tanks but no-one was hurt. The cause is under investigation.
Later, at 4.30am, a caravan parked on a driveway on Mortimer Road was deliberately torched.
A fire service spokesman asked anyone with information about the incidents to call Crimestoppers on 0800 555 111.