Firefighters spent the early hours of yesterday tackling 11 arson attacks across Wath-upon-Dearne.
They were called out at 2am to deal with a car set which had been set alight on Winfield Road.
At 3am crews were called out after a wheelie bin was set alight on Sandygate and 10 minutes after that a caravan was discovered to have gone up in flames on Stump Croft Road.
Firefighters were then alerted to a Vauxhall Combo van found burning on Park Road and at 3.30am another wheelie bin was set on fire – this time on Matthews Avenue.
A police probe into the spate of fires is now under way.
Police and fire chiefs met yesterday to discuss the arson attacks.
Station officer Jim Oakes, of South Yorkshire Fire and Rescue, said: “Luckily no one was injured in any of the incidents, but these mindless acts put lives at risk and take up valuable fire and police resources.”
Chief Superintendent Jason Harwin said: “The investigation is in its early stages and we’re putting extra resources into the area today and over the weekend. Such types of offences are rare. We are taking this very seriously and I would urge anyone with information to contact police.”
Anyone with any information should contact South Yorkshire Police on 101 or Crimestoppers on 0800 555111.