LOS ANGELES (AP) — Federal prosecutors say two people have pleaded guilty to international trafficking of endangered rhinoceros horn to China and Vietnam.

The U.S. attorney’s office said Friday that 49-year-old Vinh Chung “Jimmy” Kha and 26-year-old Felix Kha pleaded guilty to five felony counts related to smuggling $1 million to $2.5 million worth of rhino horn between 2010 and 2012.

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Additionally, Jimmy Kha’s company, Win Lee Corp., pleaded guilty to two felony counts.

The defendants said they paid as much as $7,000 a pound for the horn and in turn sold it in Asia, where it is turned into special libation cups and is used in traditional medicine.

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Two other men last month pleaded guilty to their roles in the trafficking operation.

Rhino populations have declined 90 percent over the past 40 years.

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