Arsonists have struck again at the former Kirklees College in Huddersfield.
Firefighters from Huddersfield and Rastrick spent two hours tackling a blaze at the New North Road site, which broke out at 5.45pm yesterday evening.
Police are now investigating.
Young people were seen running away from the incident in the college’s B Block by some of the crews, who spent around two hours there dampening down the flames.
It is not known where the fire started in the building, which has been repeatedly broken into since the college moved to new premises at the Waterfront Quarter in 2013.
Huddersfield watch commander Chris Bell, said: “The crews used breathing apparatus and two hoses.
“They got it under control but there was heavy smoke and they had problems with ventilating the building.
“The crews said that it was deliberate and the police have been made aware so they can start to investigate.”
The college’s F block was the target of a large fire in February 2015, which led watch commander Graham Calcraft, of Huddersfield Fire Station, to demand that the one-time Royal Infirmary building in Portland Street be properly boarded up.
Fire crews were also sent there earlier that year when a large pile of copper wire was set on fire.
Metal thieves were believed to be burning off the plastic covering.
The other half of the site bordering Portland Street and Fitzwilliam Street will be developed later.
Discussions so far have indicated a medical centre, care home and housing could be built.