Vietnam - A newly engaged couple was found dead in a hotel in Vietnam under mysterious circumstances - now new details about the cause of death have come to light!

As Daily Mail reports, the holidays were supposed to be a wonderful experience for Greta Marie Otteson (†33) and Arno Els Quinton (†36) - but they took a tragic turn instead

The couple, who had been living in Vietnam since February 2024, wanted to sweeten the Christmas holidays with a delicious dinner and a few drinks.

On December 24, they opted for two bottles of "homemade" limoncello in a restaurant - an indulgence that, according to the current state of the investigation, was probably their undoing.

The alcohol turned out to be a deadly trap: on Boxing Day, the two were found lifeless in their accommodation. The cause was initially unclear, but the police have now confirmed that the couple died of methanol poisoning.

The lemon liqueur they had drunk was apparently adulterated, which ultimately led to the fatal poisoning.

Shortly before her tragic death, Greta Marie sent her family a worrying message on Christmas Day.

She complained of the "worst hangover ever" and reported that she could see "black spots". But instead of seeking medical help, the couple decided to just sit it out and sleep it off - with fatal consequences.

Just a few days earlier, the engaged couple had surprised their families with romantic photos of their engagement, which they proudly shared on Instagram .

The tragedy is reminiscent of a similar incident in Laos in November, in which six people died from methanol poisoning .