Firefighters dealt with a series of arson attacks where cars were damaged.
Crews were called out to a van set alight on Gray Avenue, Aston, Rotherham at 4am today.
At 2am today, they dealt with a Toyota Yaris found engulfed in flames on the A637 at Haigh, Barnsley.
And at 12.30am today,a Vauxhall Astra was discovered burning on Rosecoe Drive, Stannington, Sheffield.
On Saturday crews dealt with a car torched on Alexandra Close, Kimberworth, Rotherham and a Mitsubishi and a Renault Mégane were fired on Weetfield Crescentm Shiregreen, Sheffield, the night before.
Anyone with information about any of the fires should call South Yorkshire Police on 101 or Crimestoppers on 0800 555111.