Norwegian police say that four Russian citizens have been arrested today for illegally taking photos of secret installations, a few days ago two Russian citizens were arrested for possessing drones.
According to foreign news agencies, Norway has increased its security in recent weeks.
The actions are being taken after drones were spotted near Norwegian oil and gas infrastructure.
On September 26, there was also a major leak in the Nord Stream gas pipelines off the coasts of Sweden and Denmark.
It should be noted that last Thursday, the Norwegian police arrested a Russian citizen at the border checkpoint, whose car was found with drones.
On Friday, a Russian citizen was flying a drone at the airport in the city of Tramsoy, he also had some cameras, this person was also arrested.