Officials say two more bodies have been discovered Sunday, bringing the death toll to five after a runaway train carrying crude oil derailed in eastern Quebec, igniting explosions and fires that destroyed a town’s downtown center. Quebec provincial police Lt. Michel Brunet said Sunday that 40 people are missing. Brunet says that number could fluctuate. Police earlier said that two people were found dead overnight after one death was confirmed Saturday.Maine officials don’t expect the runaway train derailment in eastern Quebec to significantly affect air or water quality across the border. The derailment Saturday caused explosions and killed at least five people in the town of Lac-Megantic, about 10 miles west of Maine. Peter Blanchard of the Maine Department of Environmental Protection said Sunday that there were concerns about smoke from the fires, but meteorologists don’t believe it will have a significant impact. And while oil that the train was carrying did spill in a river, it flows north and would not affect Maine waters. Like other states, Maine has seen an increase in trains carrying oil across the state to Canadian refineries. Blanchard says his office continues to work on developing protection plans for the areas where trains travel.