ONTARIO (From the Sault Star) - The Ontario Fire Marshal is investigating a blaze that caused extensive damage at Arauco North America.

Sault Ste. Marie Fire Services was called to the Base Line site, formerly Flakeboard, at about 11:50 p.m. on Sunday.

A sprinkler system was activated. Arauco workers were fighting a fire in a press machine and dust collection system, said platoon chief Stan Martynuck. Firefighters took over.

Spot fires followed in the early morning Monday. The fire was under control by 8 a.m., said Martynuck. The fire department was on scene until 5 p.m.

One firefighter received minor injuries. He was not taken to Sault Area Hospital.

Cause of the blaze is under investigation by fire prevention officer Carlo Provenzano and OFM investigators. Heavy damage prompted OFM participation, said Martynuck.