Four people killed in Missouri house explosion that was heard 10 miles away

Investigation ongoing as authorities say explosion at home, where propane leak was found, was unusual because it did not cause a fire

Four people in rural Missouri died when an explosion that could be heard 10 miles (6.2km) away occurred at a house.

The explosion occurred Saturday night near the unincorporated town of Goodhope. The Douglas county sheriff, Chris Degase, said the home was undergoing renovations, and a propane leak was found. The Federal Bureau of Alcohol, Tobacco, Firearms and Explosives, the state fire marshal's office and local officials continued investigating on Monday.