A young couple found dead in their hostel room during a holiday at a World Heritage site in Argentina lay in their room for at least two days before they were discovered.
The pair - named as Sofia Macarena Robledo, 27, and Jose Eduardo Rojas, 28 - were discovered unresponsive by the hostel owners and their son.
A post mortem examination found they had died from carbon monoxide poisoning and had been dead for at least 48 hours, reported local media in resort town Humahuaca.
The pair - from Buenos Aires - had last been seen alive on October 5th.
The owners of the hostel and their son have been charged with double manslaughter but currently remain free on bail, according to local media.
They found Robledo and Rojas dead on Friday at noon, on October 7th, after knocking on the door several times without getting an answer.
After finally gaining access to the inside of the room, they reportedly found the couple lying in bed and not showing any vital signs.
They unsuccessfully attempted to revive them several times, then called in emergency services for help.
Police officers from the 15th branch and Criminalistics personnel from the Public Ministry of the Accusation (MPA) arrived at the scene.
But the only thing the team of doctors could do was confirm the deaths.
The couple reportedly booked the hostel room through a website.
The hostel owners and their son have refused to make statements, the Public Ministry of the Accusation (MPA) said.
A preliminary inspection revealed Robledo and Rojas were in a room without safety ventilation, with a bottle and a water heater with no exit to the outside.
The prosecutor in charge of the case interviewed the families of the victims and ordered the analysis of the evidence at the scene, as well as blood tests for toxicology, according to local media.
Meanwhile, relatives and friends of the victims asked people on Facebook to help them collect money to bring their bodies back to the province of Buenos Aires.
The investigation is currently ongoing.
