Mystery As Two Teens and Man Found Dead in Apartment

Washington State police have revealed no "obvious manner of death" has been found for two teenagers and a man who were found dead in an apartment over the weekend.

A post-mortem examination carried out by the King County Medical Examiner's Office found no clear cause of death after two girls, aged 16 and 17, and a man in his 30s, who is believed to be related to them, were found dead in a Renton apartment on Saturday.

The Renton Police Department (RPD) said further testing would be needed in order to further establish what happened to the three people.

It added that such laboratory and scientific testing could be a "multi-week process."

An RPD statement shared via Facebook on Monday read: "Regarding Saturday's death investigation, post-mortem examinations by the King County Medical Examiner's Office performed today did not uncover any obvious manner of death for any of the three people found deceased in the 300 block of Factory Ave N.

"We are still soliciting any information about this case, and would ask anyone with direct information to contact the Renton Police at (425) 430-7500, reference case number 21-12197."

Police said in an earlier statement the bodies were discovered after the property owner entered the home and found the two girls dead in the living room.

The man was later found dead on the second floor and officers then carried out an investigation into the deaths.

Robert Onishi, an RPD detective, told K5: "We don't see situations like this, generally. Definitely not with multiple victims."

Police later told the network, the apartment was in "really good condition" and that there were no clear examples of foul play, no visible signs of trauma on the bodies and nothing to indicate there had been a struggle.

Newsweek has contacted the RPD for comment.

Earlier this year a family was found dead in northern California while out on a hike in a case that left authorities baffled.

John Gerrish, Ellen Chung and their one-year-old daughter, Miju, were found along with their dog in August at a remote trail in the Sierra National Forest.

It was later established that the three died of possible hyperthermia and dehydration according to Mariposa County Sheriff Jeremy Briese. The dog is believed to have suffered a heat-related death.

According to CBS News, he said: "This is a real tragedy."