Mysterious Deaths Still Under Investigation in Renton

(Renton, WA) -- An investigation continues in the Seattle suburb of Renton, and authorities say it could be months before we learn the cause of death for two teenage girls and their father who were found dead inside their apartment on Saturday.

The King County Medical Examiner's Office performed autopsies Monday on 17-year-old Adriana Gil, 16-year-old Mariel Gil and 33-year-old Manuel Gil. The report did not uncover any "obvious manner of death". None of the three had any visible injuries or trauma to their bodies, and there was no sign of foul play or a struggle…also no sign of carbon monoxide.

Officials says further testing is necessary before a cause of death can be determined. The investigation remains open and ongoing.