arsonists have damaged fences at Doncaster Racecourse.
Firefighters were called to three fires at the Racecourse over the weekend.
The first fence fire at 1.30am on Sunday is still being investigated.
Two other fires at 10.30am on Sunday and 11.30pm on Sunday have both been logged as deliberate.
Doncaster station attended all three incidents involving fences on the track.