Health officials come out of Nana Backpackers hostel after checking documents in Vang Vieng, Laos, Friday, Nov. 22, 2024. (AP Photo/Anupam Nath)

A foreign tourist couple rest near a swimming pool at Nana Backpackers hostel in Vang Vieng, Laos, Friday, Nov. 22, 2024. (AP Photo/Anupam Nath)

A woman with a bicycle walks pasts Nana Backpackers hostel in Vang Vieng, Laos, Friday, Nov. 22, 2024. (AP Photo/Anupam Nath)

A man walks past the tourism control police station in Vang Vieng, Laos, Friday, Nov. 22, 2024. (AP Photo/Anupam Nath)

Tourists ride on a motorbike near the tourism control police station in Vang Vieng, Laos, Friday, Nov. 22, 2024. (AP Photo/Anupam Nath)

A foreign tourist rests near a swimming pool at Nana Backpackers hostel in Vang Vieng, Laos, Friday, Nov. 22, 2024. (AP Photo/Anupam Nath)

Health officials leave Nana Backpackers hostel after investigation in Vang Vieng, Laos, Friday, Nov. 22, 2024. (AP Photo/Anupam Nath)

A woman cleans near the emergency section of a hospital where poisoned foreign tourists admitted in Vang Vieng, Laos, Friday, Nov. 22, 2024. (AP Photo/Anupam Nath)

The empty bar of Nana Backpackers hostel in Vang Vieng, Laos, Friday, Nov. 22, 2024. (AP Photo/Anupam Nath)

A doctor comes out of the hospital where poisoned foreign tourists were admitted in Vang Vieng, Laos, Friday, Nov. 22, 2024. (AP Photo/Anupam Nath)

Health officials check documents and ask questions to Nana hostel employees in Vang Vieng, Laos, Friday, Nov. 22, 2024. (AP Photo/Anupam Nath)

This photo shows the exterior of Bangkok Hospital, in Bangkok, Thailand, Friday, Nov. 22, 2024. (AP Photo/Sakchai Lalit)

The Nana Backpackers hostel wearing a deserted look in Vang Vieng, Laos, Friday, Nov. 22, 2024. (AP Photo/Anupam Nath)