TOKYO -- A Japanese trading company's Chinese employee overseeing rare metals in China was taken into custody by Chinese authorities earlier this year, according to sources familiar with bilateral relations.
Latest incident comes as Beijing clamps down on information leaks

The Bayan Obo rare-earth mine in China's Inner Mongolia. © Reuters
TOKYO -- A Japanese trading company's Chinese employee overseeing rare metals in China was taken into custody by Chinese authorities earlier this year, according to sources familiar with bilateral relations.