Area firefighters were able to extinguish a house fire in Shaftsbury Tuesday within minutes and keep damage contained to a corner. Shaftsbury Fire Chief Joseph Vadakin said the cause of the fire that ignited outside the 254 Grove St. home around 5 p.m. is unknown, but he said it may have been caused by an all-terrain vehicle the homeowner had driven earlier and parked behind the house where there were dry leaves.