FORMER council offices in Worsbrough Bridge were deliberately set on fire.
Firefighters from Barnsley and Tankersley tackled the blaze at the derelict property on Park Road at about 12.30am last Tuesday.
The fire was started on the first floor and the aerial ladder platform was also used.
The roof was badly damaged, but the fire did not spread and nobody was injured.
The crews left at about 2.30am.
A spokesman for the Fire Service said the fire was started deliberately.
