An investigation is still trying to determine what happened to a Utah family who died in their home Saturday. All five members of the five members of the family, two parents and three children, were discovered by relatives in their home around 8 p.m. according to police.

Springville Police spokesman Lt. David Caron said the family was living in a duplex, and none of the other occupants were harmed. Investigators found no sign of carbon monoxide, although he added that the gas could have escaped from the home before rescuers tested the air.

While the victims' names were not released, the parents ages were given as 36 and 37. The three children were a 12-year-old girl and two boys, 11 and 14..

"There were no obvious signs of trauma or foul play," Caron said during a phone interview with The Associated Press. "We didn't see that when we first got there, and we still don't."

On arrival, Caron said the police found the doors to the house were open but might have been left that way after an older son and two grandparents discovered the bodies.

"They said they had spoken with the family earlier this morning and hadn't heard from them and stopped by," Caron told the Deseret News. "When they went in and found the five of them, they immediately called us."

The Salt Lake Tribune reported that two pet cats and another animal believed to be a ferret were all found alive in the home.

"Police secured the scene and checked to make sure it was safe to continue the investigation inside," he said. Caron added that police do not believe this incident signals that there is any danger to the Springville community, which borders Provo, Utah, to the south.

A medical examiner will likely determine the family's actual cause of death.