FSK (Forsvarets Spesialkommando) is a special forces unit of the Norwegian Ministry of Defence. The unit was established in 1982 due to the increased risk of terrorist activity against Norwegian interests, including the oil platforms in the North Sea.

In peacetime, they are a support element to the Norwegian Police force and law enforcement agencies in allied nations, acting when requested in serious incidents like hostage situations and aircraft hijacking.

During counter-terrorist operations, the commandos are trained to kill their opponents, rather than trying to arrest them.