The 63-year-old died on Saturday after developing a strange illness, according to one of the three colleagues.

Area police spokesperson who confirmed the death says the body has been taken to the country's capital Kampala for postmortem.

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Police in Kanungu have initiated investigations to find the possible cause of death.

Piere becomes yet another statistic bringing the number of foreigners who have died in the country to 8 since February.

Bwindi Impenetrable National Park protects an estimated 400 mountain gorillas, about half of the world’s population.