The Ontario Fire Marshal’s office was brought in to investigate a fire in Lindsay on Saturday morning.
It happened at the former Northern Plastics Manufacturing plant on St. David Street just after 3 a.m.
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Around 40 firefighters from seven stations battled the blaze. It took nearly three hours to get it under control.
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There are no reported injuries.
At this point, the cause is not known and a damage estimate is yet to be determined.