Thai authorities have found cyanide not only in tea, but also in food in a hotel room in Bangkok, where six people, four Vietnamese and two Americans of Vietnamese, were found dead, reported local media.

The Vietnamese Embassy in Thailand is working with competent authorities in Thailand to fact-check the case that four Vietnamese nationals were found dead in a Bangkok hotel, as well as carry out necessary citizen protection measures, Vietnamese Ambassador to Thailand Pham Viet Hung said.