What happened at Phuket cafe where Indian tourists fainted one by one 'for no obvious reason'? 1 dead

A 26-year-old Indian tourist, Kushagra Agarwal, died at a Phuket cafe after collapsing and three others fainted simultaneously. The incident occurred on May 9th and the Indian embassy is providing support to the deceased's family. The four men were reportedly at a cafe around 11 pm before losing consciousness one by one. Two of the men remain in a coma, while the remaining three are reported as stable. Police are investigating but have not released any conclusions about the cause of the incident.