HONG KONG (AP) — Hong Kong’s leader on Tuesday urged foreign governments to respect the duties of its overseas-based trade offices after a staff member in its London branch was charged in Britain for allegedly helping the city’s intelligence service gather information.

Chief Executive John Lee said his administration has demanded the British government to provide an explanation about the prosecution of Bill Yuen, the office manager of the Hong Kong Economic and Trade Office in London. Lee said any attempt to make unwarranted allegations against the city’s government is unacceptable.

British police allege that Yuen, along with Chi Leung (Peter) Wai and Matthew Trickett, agreed to engage in information gathering, surveillance and acts of deception that were likely to materially assist the Hong Kong intelligence service. The trio was charged under a new national security act that gave British police additional powers to tackle foreign espionage.