Vandals did £2,000-worth of damage to the AstroTurf at the NSC Bowl when they set it alight.
Police say it was attacked sometime between 9pm on Saturday, April 8, and 6:30am on Thursday, April 13.
They made their first appeal for information about the crime this morning.Spent matches were discovered melted into the surface at the point where the fire was set.Specialist contractors will have to be employed to repair it.Police asked anyone with information to call police headquarters on 631212,