National Security Department is responsible for:
- collecting and analysing intelligence and information concerning national security;
- planning, coordinating and enforcing measures and operations for safeguarding national
security;
- investigating offences endangering national security;
- conducting counter-interference investigation and national security review;
- carrying out tasks of safeguarding national security assigned by the Committee for Safeguarding
National Security of the Hong Kong Special Administrative Region; and
- performing other duties and functions necessary for the enforcement of <The Law of the
People’s Republic of China on Safeguarding National Security in the Hong Kong Special
Administrative Region>.