A fire was set to debris left during the demolition of the Aldergrove school site on Thursday morning.
At 3:09 a.m., Township fire crews responded to a call about the 'bonfire' at the school site in the 27000 block of Fraser Highway.
Three fire engines responded and Fraser Highway had to be blocked off while fire trucks accessed hydrants, said Township fire chief Stephen Gamble.
There were several locations where the fire was deliberately set, said Gamble.
It didn't take crews long to knock down the blaze. The demolition company was called in to use their machine to tear the pile apart which stopped the fire from gathering momentum, he said.
The old school site was knocked down on Dec. 14 and 15. A fence has been put up around the debris and there are do not enter signs put up.
Only the facade of the school that was built in 1912 will remain as a heritage site, which will be incorporated into the new recreational centre being built on the property.