I work in Columbia Missouri and a coworker and i ran into town for lunch and on the way to town we noticed a huge cloud of black smoke. I made the comment that something must have blowed up,then when i got home tonight and watched the news it said there was a house that exploded and there was a man and woman in the house. He was in the basement and was killed and she was laying out in the back yard with 3rd degree burns all over and in critical condition. It blew the windows out of the house next door. As of now it is undeterminded what cause the explosion.