LEBANON (AP) — Investigators said Tuesday a package sent to a rural Tennessee home exploded, killing a lawyer who lived there and injuring a woman.Killed was 74-year-old Jon Setzer, and 72-year-old Marion Setzer was in critical condition at Vanderbilt University Hospital on Tuesday, police said.TBI officials declined to say what kind of package was sent to the Lebanon home.“A package was delivered. As far as where or when, I can’t give that information,” TBI spokeswoman Illana Tate said.Along with the TBI, agents from the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives, were investigating at the home on a rural cul-de-sac.“We will be here night and day trying to come to the quickest resolution to this issue as we can,” TBI director Mark Gwyn said.Earlier, alcohol bureau spokesman Michael Knight said investigators had ruled out accidental causes like gas leak or electrical malfunction. Later authorities confirmed it was a package.