Aug. 11 (UPI) -- At least one person was killed and another injured after an explosion Sunday morning in suburban Baltimore damaged multiple residences, authorities said. One house was completely destroyed. Officials confirmed that the 73-year-old owner of the home in Bel Air was found dead. The owner had just placed the home on the real estate marketer and was preparing for an open house. Advertisement "What I can confirm is that there was an odor of gas in the area. We can confirm BGE was