A Canadian man from Edmonton has become the seventh mystery death in a month in a controversy which has rocked the northern Thai capital of Chiang Mai.

Canadian Bill Mah, 59, died after using the facilities of the Downtown Inn in Chiang Mai, where a British couple and a Thai tourist guide were found dead in their rooms, and also from where a 23-yr-old New Zealand woman was taken convulsing and vomiting before her death in hospital.

Andrew Drummond