VDD is one of the three Security and Intelligence Services in Latvia besides Constitution Protection Bureau (SAB) and Defence Intelligence and Security Service (MIDD). VDD is internal counterintelligence and security service, which gathers the information from different sources, carries out its analysis, informs senior officials about the threats identified to the national security as well as takes measures to neutralise them.
VDD’s responsibility is the conduction of counter-intelligence activities, protection of state secrets, protection of constitutional order, economic security, coordination and conduction of counterterrorism measures as well as protection of dignitaries (more detailed under Competencies). VDD is also the only security and intelligence service with the right to carry out pre-trial investigation (to initiate criminal proceedings, initiate criminal prosecution as well as arrest persons).
The work of VDD is supervised by the Minister of Interior, the operational activities and the legitimacy of pre-trial investigation process is supervised by the General Prosecutor, but the parliamentary control over VDD is performed by the National Security Committee of the Saeima (the Parliament).