The Norwegian Police Security Service (Politiets sikkerhetstjeneste (PST), Politiets tryggingsteneste (PTT)) is the police security agency of Norway.

[1] The service was established in 1937 by direction of the Ministry of Justice led by Trygve Lie.

[2] It is responsible for monitoring and maintaining interior security in Norway.

In addition, PST is in charge of all VIP protection domestically and abroad[3] except for the royal family, which has its own independent escort service.

The agency is monitored by the Norwegian Parliamentary Intelligence Oversight Committee, after the debates concerning the Lund Report.