Human rights activists protest the missing booksellers
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The mystery of the missing Hong Kong bookseller

Hong Kong's top official, CY Leung, says his government is greatly concerned about the case of a missing bookseller.

Paul Lee, an owner of the Causeway Bookstore, which specialises in titles critical of the Chinese government, disappeared last week.

He is the fifth person linked to the bookshop to seemingly vanish.

Juliana Liu reports from Hong Kong.

  • 04 Jan 2016
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