A small fire at the Idaho National Laboratory flared up Monday afternoon on the roof of a building at the lab’s Materials and Fuels Complex. The fire was put out with no injuries. INL spokesman Ethan Huffman believes welding work sparked the blaze. "The particular building that had the fire involved in it did not house radioactive materials. It housed standard offices, conference rooms, the cafeteria." Huffman says there is no danger or risk to the public. He characterizes it as a minor fire.