Construction of a planned barbed-wired fence along Finland’s long border with Russia will start early next year, Finnish border guard officials said, amid concerns in the Nordic country over the changing security environment in Europe.

The initial three-kilometre (1.8-mile) stretch of the fence will be erected at a crossing point in the eastern town of Imatra by the summer of 2023.

It will eventually extend to a maximum of 200 kilometres (124 miles).

Finland’s 1,340-kilometre (832-mile) border with Russia is the longest of any European Union member.

Prime Minister of Finland Sanna Marin
Prime Minister of Finland Sanna Marin (Emmi Korhonen/Lehtikuva via AP)

In October, Finnish Prime Minister Sanna Marin said there was consensus among legislators to build a fence to cover parts of the border with Russia in a project that is estimated to cost a total of 380 million euros (£330 million) and scheduled to be completed by 2026.

According to Ms Marin, the fence’s main purpose would be to help border guards monitor and prevent possible large-scale illegal migration seen as a hybrid threat from Moscow.

Her government has not publicly cited Russia’s war in Ukraine or Finland’s decision to join Nato as a reason to build a fence.

But Helsinki is concerned over developments both in Russia and Ukraine, as well as Moscow’s threats of retaliation should Finland join the military alliance.

Politicians and experts have said it is not sensible – or even possible – to erect a fence along the entire length of Finland’s long eastern frontier that runs mainly through thick forests.

In some places the Finnish-Russian border is marked only by wooden posts with low fences meant to stop stray cattle.

The fence, initially proposed by the Finnish Border Guard, is set to be built in stages ranging from five kilometres (three miles) up to 52 kilometres (32 miles).

It would be erected mainly in south-eastern Finland, where most border traffic to and from Russia takes place, but short sections would also be built in the northern Karelia region and the Lapland region in the Arctic.

People travelling from Russia in cars and coaches queue to cross the border to Finland at the Vaalimaa border checkpoint in Virolahti, Finland
People travelling from Russia in cars and coaches queue to cross the border to Finland at the Vaalimaa border checkpoint in Virolahti, Finland (Jussi Nukari/Lehtikuva via AP)

Colonel Vesa Blomqvist, border guard commander in south-eastern Finland, said that once completed, the fence will significantly bolster border control.

“The fence gives border guard patrols more reaction time by revealing movement of people and preventing, slowing down and directing movement,” Col Blomqvist said in a statement.

The fence will be three metres (10ft) high with a barbed-wire extension on top.

Apart from extensive patrolling, the Finnish border guard currently uses electronic and other devices to monitor border activity.