Text messages from two Danish backpackers who died in a mass poisoning in Laos suggest the pair had been vomiting blood for 13 hours. Anne-Sofie Orkild Coyman, 20, and Freja Vennervald Sorensen, 21, were later discovered dead at Nana Backpackers in Vang Vieng,

A fifth person, identified as a British woman, has died in connection with a mass alcohol poisoning incident at a tourist spot in Laos, the British government confirmed Thursday.

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.