The Laotian government on Saturday officially acknowledged the mass poisoning that has killed at least six tourists, promising it would bring perpetrators to justice. Two Australian teenagers and a British woman died from suspected methanol poisoning after drinking tainted alcohol in Laos.

An American citizen has died at a popular adventure spot in Laos where alcohol tainted with methanol has been blamed for a spate of poisonings in recent days.

The U.S., Australia and U.K. have issued warnings for travelers in Vang Vieng after several tourists died in a suspected methanol poisoning outbreak.