Police in Laos have arrested three more staff members from a hostel believed to be the source of suspected methanol poisoning that killed six tourists.
9News understands that at least 11 employees from the Nana Backpacker Hostel in Vang Vieng have already been detained as part of investigations into potentially tainted drinks.
Two Melbourne teenagers, friends Holly Bowles and Bianca Jones, died hours apart in a Thai hospital last week.
Their bodies have since been flown back to Australia.
American James Lewis Hutson, 57, British lawyer Simon White, 28, and Danes Anne-Sophie Orkild Koiman, 20, and Frela Vennerwald Sørensen, 21, were named as the four other tourists who died.
A third Australian was later confirmed to have fallen ill but was last known to be recovering in hospital in a stable condition.
The source of the deadly outbreak is believed to be a dilapidated factory outside Vientiane that produced Tiger Vodka and Tiger Whisky.
The factory was ordered to close and the owner was arrested.
Laos banned the sale and consumption of Tiger Vodka and Tiger Whiskey after the tourists’ deaths.
SmartTraveller warned Australians in Laos to avoid consuming the products due to “serious safety concerns”.
Investigations are ongoing.