A Champagne drinker died after quaffing on an expensive bottle of bubbly which had been spiked with ecstasy.
Dutch health authorities warned drinkers to check their bottles after four people were hospitalised after sharing the £365 bottle which had been tampered with.
A night out ended in tragedy in Germany where eight people had to seek medical attention after ordering a bottle at a restaurant, with a 52-year-old man dying.
Authorities are now examining how the drug got into their drinks.
Reports from Bavaria suggest the three-litre bottle contained 1,000 times a single dose of ecstasy.
Senior prosecutor Gerd Schäfer said: “There were things in it that normally are not in Champagne. It had a toxic, a poisonous effect."
Investigators suspect a case of negligent homicide, a police spokesperson told public broadcaster Bayerischer Rundfunk.
It is believed the bottles were bought from the same website.
Anyone fancying a drink has been advised to check their bottles before popping the cork to avoid disaster.
MailOnline report the Dutch Food and Consumer Product Safety Authority said: “Recently, both in Germany and the Netherlands, a bottle of [three-litre Moët & Chandon Ice Imperial] was found to be filled with the hard drug MDMA.
“Touching and/or drinking the contents of the bottles is life-threatening. This has led to seven very serious illnesses and one death in Germany.”
Producer Moet Hennessy told the authorities the website is yet to be identified.
Tampered with bottles can be recognised as the drink does not bubble when poured into a glass.
But they have warned a single sip could be fatal.
A spokesman said: “Even dipping your fingertip into the liquid and tasting it can cause serious health problems, even if you don't swallow it.
“People should also not touch, let alone taste, the contents. Taking a small sip can be fatal."
The warning applies to 3-litre bottles of Moet & Chandon Ice Imperial with the serial number LAJ7QAB6780004.
