Explosions and a fire engulfed a Montana wood-products plant owned by Plum Creek Timber Co on Tuesday but all workers were accounted for and no injuries were reported, an emergency official said. Dozens of fire crews were battling flames at the facility in the northwest Montana community of Columbia Falls several hours after the blaze broke out between 3 p.m. and 4 p.m. (2100 GMT and 2200 GMT), said Cindy Mullaney, deputy director of the Flathead County Office of Emergency Services. Sixty workers were safely evacuated from the plant, she said.