A family of five was found dead in their home south of Springville, Utah Saturday night. A couple ages 36 and 37 along with their three children ages 14, 12, and 11 were discovered by a relative who came to visit the house around 8 p.m. local time Saturday night. The family lived in a duplex, and the residents of the other half were unharmed. Firefighters did not find any carbon monoxide the air, though it could have potentially been filtered out before their arrival. A preliminary autopsy ruled out any violent assault in the deaths. There was no evidence of stabbing or gunshot wounds or visible injuries to the five. "Right now there’s no known cause of death," said Springville Police Lt. David Caron."There’s nothing obvious."