Finland has closed its entire 1,340 kilometer-long border with Russia after accusing Moscow of “instrumentalizing” asylum-seekers by sending them across the frontier in a hybrid attack, in retaliation for Finland’s joining of NATO. Russia denied the accusation and warned that the deployment of any military units at the border would be seen as a threat by Moscow.

The Finnish Border Guard said more than 900 asylum-seekers from countries including Kenya, Morocco, Pakistan, Somalia, Syria and Yemen entered Finland from Russia in the month of November. Previously, the rate was less than one per day.

The Finnish government responded by closing all but one of the official border crossings in mid-November. On Thursday, Finland closed the last remaining crossing, at Raja-Jooseppi, inside the Arctic Circle, sealing off the entire frontier for at least the next two weeks.

Finnish Prime Minister Petteri Orpo said his country would not accept Russian interference.

“Instrumentalized migration from Russia has continued. I would like to stress that it is not just the number of arrivals that is at issue, but the phenomenon itself,” Orpo said at a news conference Thursday.

“In recent days, there has been a growing understanding that this is an organized activity, not a genuine emergency. … We don’t accept any attempt to undermine our national security.”

FILE - Finnish Border Guards escort the migrants at the international border crossing at Salla, northern Finland, Nov. 23, 2023. (Lehtikuva/Jussi Nukari via Reuters)

FILE – Finnish Border Guards escort the migrants at the international border crossing at Salla, northern Finland, Nov. 23, 2023. (Lehtikuva/Jussi Nukari via Reuters)

Russia is clearly trying to weaponize migration, said analyst Charly Salonius-Pasternak of the Finnish Institute of International Affairs.

“There are interviews [with migrants] saying that some of these people have been given an option: Either go to the front in Ukraine, or then jump in a bus or military truck, be driven up to the Arctic Circle or further north, and then be forced to buy a bicycle and try to get across,” he told VOA. “So, it’s very structured how the Russian authorities have done this.”

Russia’s actions are seen as retaliation for Finland’s joining of NATO in April following Moscow’s full-scale invasion of Ukraine. Its membership of the alliance ended decades of nonalignment.

“Finland is considered by Russia to be a hostile state,” Salonius-Pasternak said. “And as we’re seeing through this weaponization of people and flows, it is actively trying to destabilize Finland and maybe cause other kinds of havoc. It hasn’t succeeded yet, but clearly there’s some intent here.”

The head of the Polish National Security Bureau, Jacek Siewiera, wrote on the social media site X on Tuesday that his country would send military advisers to Finland in response to “an official request for allied support in the face of a hybrid attack on the Finnish border.” Finland said it had no knowledge of the offer.

Poland accused Belarus of sending tens of thousands of asylum-seekers to their shared border in 2021, creating a humanitarian crisis. Belarus is a close ally of Moscow.

Russia denies accusations that it is driving the migrant flows to the Finnish border.

“There is no threat there, in reality there is no tension,” Kremlin spokesperson Dmitry Peskov told Reuters Thursday. “Tension may actually arise during the concentration of additional units on our border, because the Finns must be clearly aware that this will pose a threat to us.”

There are concerns in Finland that some migrants may try to cross the border illegally, risking their lives. Dozens of migrants died on the Belarus-Poland border in 2021, prompting accusations that Europe was turning a blind eye to human rights abuses.

“It’s been down to minus-25 [degrees Celsius]. It will go there again. It’s supremely inhospitable to anyone seeking to cross the border,” said analyst Salonius-Pasternak. “So there is this fear — will we start seeing video or pictures of people just having frozen in the wilderness?”

Estonia said Thursday it was also ready to close its border with Russia if there is a big influx of migrants. The government warned its citizens against traveling to Russia in case they are unable to return.