An Australian teenager has become the sixth foreign tourist to die in a suspected mass methanol poisoning in Laos, as a growing list of countries warned of the potentially fatal consequences of drinking tainted alcohol in the Southeast Asian country.

The families of Bianca Jones and Holly Bowles have arrived in Thailand to bring their bodies back home as tributes pour in.

The government of Laos breaks its silence over the deaths of six tourists from methanol poisoning, saying it is "profoundly saddened".