The cause of a gas line explosion in Marshall County from early Thursday morning remained under investigation hours after the ensuing fire was out. Investigators from the West Virginia Department of Environmental Protection and Trans-Canada remained on the scene Thursday. The blast happened along Trans-Canada’s Midstream Pipeline around 4 a.m. Thursday. The fire cast a glow hundreds of feet into the air which was seen and heard for miles. When the sun rose, the immediate area of the explosion and fire revealed the results of the intense heat from the blaze. “There were calls going into Ohio County, Wetzel County and across the river in Belmont and Monroe County, Ohio and also into Greene and Washington Counties in Pennsylvania,” said Marshall County Emergency Services Director Tom Hart. “It could be heard and seen for miles and a lot of people could actually feel the roar and said it was like an airplane going over their house.”