COPENHAGEN, Denmark (AP) 鈥 Norway's government said Thursday that it was expelling 15 Russian diplomats from the country, saying they were suspected of spying while working at the Russian Embassy in Oslo.

Foreign Minister Anniken Huitfeldt said the move was 鈥渁n important measure to counter and reduce the scope of Russian intelligence activities in Norway, and thereby secure our national interests.鈥

The Russians declared persona non grata 鈥渕ust leave Norway within a short time," Huitfeldt said, adding: "We will not grant visas to intelligence officers who apply for a visa to Norway.鈥

The minister declined to say whether the government was acting in response to a specific incident, referring questions to Norway鈥檚 domestic security agency PST for details. The government said the activities of the expelled diplomats were 鈥渋ncompatible with their diplomatic status.鈥

鈥淲e are not talking about regular diplomats, but intelligence officers under diplomatic cover. Their activities are a threat to Norwegian interests,鈥 Huitfeldt said.

Norwegian newspaper VG described Thursday鈥檚 expulsions as the most the Scandinavian country has ordered at one time involving Russian diplomats.

The Russian Embassy in Norway called the Norwegian government's decision 鈥渁n extremely unfriendly step鈥 and promised Moscow would take 鈥渞etaliatory measures,鈥 which in such a case typically involve in-kind expulsions.

Huitfeldt reacted during an afternoon news conference, saying: 鈥淩ussia has no reason to respond. We have Norwegian diplomats stationed in Russia, but none of them are undercover intelligence officers.鈥

She called Russia 鈥渁n unpredictable neighbor鈥 and 鈥渕any European countries in the past year have expelled hundreds of Russian intelligence officers under diplomatic cover.鈥

At the same time, she stressed that the government in Oslo wants 鈥渘ormal diplomatic relations with Russia, and that Russian diplomats are welcome in Norway鈥

鈥淲e do not want people who claim they are diplomats and who are actually are intelligence officers,鈥 she said. 鈥淲e cannot accept that.鈥

NATO-member Norway has a 198 kilometer-long (123-mile) border with Russia in the Arctic.

VG said that including the expelled diplomats, Russia had about 40 people working at its missions in Norway, which include the embassy in Oslo and consulates in Kirkenes and Barentsburg.

Barentsburg, located on the remote Arctic archipelago of Svalbard, is a Russian coal-mining town of about 500 people. Under a 1920 treaty, Norway has sovereignty over the archipelago, which is more than 800 kilometers (500 miles) north of the Norwegian mainland, but other signatory countries have rights to explore its natural resources.

A year ago, Norway expelled three Russian diplomats it identified as intelligence officers.

A man whom the Norwegian Police Security Service alleged used a false name and identity while actually working for one of Russia鈥檚 intelligence services also was arrested last year. He is awaiting trial in Norway.

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