Details on the alcohol poisoning began trickling out about a week after the two Australian women fell ill on Nov. 13 following a night out drinking with a group in the remote town.

An Australian teenager has died after drinking tainted alcohol in Laos in what Australia’s prime minister on Thursday called every parent’s nightmare. An American and two Danish tourists also died, officials said, following reports that several people had been sickened in a Laotian town popular with backpackers.