Police are waiting to speak with a man who remains in the Tweed Hospital in an induced coma.
They say the 50-year-old arrived on a flight from Tokyo last Thursday, but got sick and was taken to the hospital on Monday afternoon.
The man had surgery and remains in a serious condition.
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Police allege that more than 100 grams of a prohibited drug, suspected to be cocaine, was recovered during the procedure.
Investigators hope to speak with the man once he is deemed well enough.
Police are in touch with to the Japanese Consulate.