HUDSON, Wyo. (AP) — Authorities say an arsonist is to blame for a mobile home explosion that killed two people in Hudson last November.

Capt. Ryan Lee with the Fremont County Sheriff's Department says the case is now being treated as a double homicide. Investigators ruled out a natural gas explosion as the cause, and sheriff's deputies say they have some leads.

The Nov. 17 explosion in the small central Wyoming town killed 20-year-old Elva Quiver and her 42-year-old boyfriend, Eric Likes.

Lee says, "We have a lot of evidence that has been destroyed and unrecognizable, so it takes time to put everything together."