More than a kilogram of heroin stuffed inside 46 golf balls destined for Taiwan where seized by Police in military-ruled Myanmar on Wednesday.

The Pyi Myanmar weekly said workers at a courier office in Yangon became suspicious when a young woman dropped off a parcel for delivery to Taipei, but left before filling out the necessary paperwork.

Upon arrival, police discovered the balls were fake and each contained a small bag of around 25 grams (0.9 ounces) of heroin.

Myanmar is the world’s number two producer of opium, the raw material for heroin, behind Afghanistan. Most of its poppy fields are in the lawless mountainous region of the eastern Shan state, near the borders with Laos and Thailand — the so-called Golden Triangle.