Britain said on Wednesday that any intimidation on British soil of foreign nationals by China or other states was unacceptable and that it was investigating the matter, responding to a media report about a so-called secret Chinese police station.
Britain has previously said that reports of undeclared police stations in the country were "extremely concerning," and that the police were looking into the issue.
Earlier this week, U.S. federal agents arrested two New York residents for allegedly operating a Chinese "secret police station" in the Chinatown district of Manhattan. China said it firmly opposed what it called "the US's slanders and smears."