'Missing Hong Kong booksellers are innocent' - Xi Nuo

The co-author of a book many believe is behind the disappearance of five Hong Kong booksellers has told the BBC that the men should not be held responsible.

Some analysts believe the book their publishing house was set to print, titled Xi Jinping and His Lovers, may have angered the Chinese government and be behind their disappearance and detention.

Juliana Liu reports from Hong Kong.