VANG VIENG, Laos — A second Australian teenager who became critically ill after drinking poisoned alcohol in Laos has died in a Bangkok hospital, her family said Friday, bringing the death toll in the mass poisoning of foreign tourists to six.

Holly Bowles, 19, had been in critical condition on life support after being poisoned in Laos more than a week ago.

”We are so sad to say that our beautiful girl Holly is now at peace,” her family said in a statement sent to Australian Network 10 and other Australian media. ”We find comfort and solace in knowing that Holly brought so much joy and happiness to so many people.”

An official at Vang Vieng’s tourism police office, who declined to be named, told The Associated Press on Friday that a “number of people” had been arrested in the case but that no charges had yet been filed. Staff at Nana Backpacker Hostel, which was still operating but not accepting new guests, confirmed that the manager and owner were among those taken in for questioning.

Tourist police offices are common in Southeast Asia and are set up specifically to assist with incidents involving tourists and other foreigners.

The US State Department on Friday issued a health alert for citizens traveling in Laos, warning of “suspected methanol poisoning in Vang Vieng, possibly through consumption of methanol-laced alcoholic beverages,” following similar warnings from other countries whose nationals were involved.

Australia’s prime minister announced on Thursday that a 19-year-old citizen, Bianca Jones, had died in a Thai hospital where she had been evacuated for emergency treatment, and that her friend – Bowles – remained in hospital “fighting for his life”.

A 28-year-old British woman, Simone White, also died in the suspected poisoning, the British Foreign Office said.