Some 40 Russian diplomats are currently accredited in Oslo, so the expulsions amount to more than a third of their number.
It is the latest instance of a Western nation expelling Russian diplomats since the beginning of the Ukraine war last year. So far this year, Estonia, the Netherlands, and Austria have also expelled Russian diplomats, Reuters reported.
“Their activities pose a threat to Norway,” Norwegian Foreign Minister Anniken Huitfeldt told a news conference.
“We have followed their activities over time. They have increased since the Ukraine war.”
The officers concerned must leave Norway shortly, she added.
The Russian foreign ministry said Moscow would respond to the expulsions, state-owned news agency TASS reported, without elaborating.
Officials at Russia’s Oslo embassy were not immediately available for comment when contacted by Reuters.
Norway, a member of the NATO military alliance, shares a border with Russia in the Arctic.
The expulsions could further complicate the process of transferring the chair of the Arctic Council, a multilateral body in which Arctic nations discuss issues affecting the polar region.
Moscow currently holds the chair but Norway is due to take over on May 11 and Oslo had said it would prioritize a smooth transition.
Huitfeldt said it was too early to say whether the expulsions would affect the Arctic Council transition.
The Nordic country still seeks to maintain normal diplomatic relations with Russia, and Russian diplomats are welcome in Norway, Huitfeldt said.
MNA/PR