The disappearance of Lee Bo, who holds a British passport and publishes books critical of Chinese politics, was a "serious breach" of an agreement signed with Beijing before the city was handed back to China in 1997, said foreign secretary Philip Hammond in a new report.
Four other booksellers from the Mighty Current publishing house also disappeared in October and the Chinese authorities have confirmed they are now under criminal investigation.
Letters purportedly written by Lee and sent to his wife confirmed he was now on the mainland and said he had gone to China of his own volition to help with unspecified investigations.
Lawmakers and activists have accused Chinese authorities of snatching Lee from Hong Kong, contravening the semi-autonomous city's laws which do not allow Chinese police to operate within the territory.
"The full facts of the case remain unclear, but our current information indicates that Mr Lee was involuntarily removed to the mainland without any due process under Hong Kong SAR law," said Hammond in a regular six-monthly report on Hong Kong to the UK parliament.
Hong Kong's security bureau said it had no immediate comment.
The city enjoys freedoms unseen on the mainland, protected for 50 years under the joint agreement.
But there are growing fears those freedoms are being eroded as Chinese influence grows.
Booksellers Lui Por, Cheung Chi-ping and Lam Wing-kee disappeared in southern mainland China in October.
A fourth missing member of the company, Gui Minhai, a Swedish national, was paraded weeping on Chinese state television in January, where he said he had turned himself in for a fatal driving accident 11 years ago.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
