Police are investigating a suspicious fire that destroyed a Canadian National Railway trestle bridge outside the town of Mayerthorpe in Alberta, Canada, on Tuesday afternoon, April 26, according to media reports. Three dozen firefighters battled the blaze on the ground while helicopters and planes bombed the bridge with water from above.

The bridge fire was one of 17 fires that have broken out in the area in the past week, and all are under investigation, according to reports. Credit: YouTube/Nathanyal Warnock