The eight rhino horns weighing a total of 6.2 kilograms (13.6 pounds) were discovered yesterday when airport security X-rayed the suspects' baggage.
The Customs Department said today that the two men were headed to Cambodia after a flight from Zambia that stopped in Addis Ababa and Bangkok.
Horns, blood, skin and urine from endangered rhinoceroses are in high demand across Asia for their use in traditional Chinese medicine.
Thai authorities say they have seized 38 rhinoceros horns worth over $6 million in three cases over the past four years. The suspects face charges of violating customs and wildlife protection laws.
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