Polish soldiers began laying razor wire along Poland’s border with the Russian exclave of Kaliningrad on Wednesday after the government ordered the construction of a barrier to prevent another migration crisis.

The Defense Minister said that a recent decision by Russia’s aviation authority to start flights from the Middle East and North Africa to Kaliningrad led him to take the step.

There will be three rows of razor wire along the border, which will be 212 meters high and 10 meters wide, with an electronic monitoring system and cameras. The Polish side has a fence that keeps animals away from the wire.

Alexander Korytnyi, the chief executive of the Khrabrovo airport in Kaliningrad, told Russia’s Interfax news agency on Oct. 3 that his airport would seek to attract airlines from countries in the Persian Gulf and Asia.

The plans for the airport were described as disturbing by Blaszczak.

The border barrier is a Polish matter, according to the Kremlin spokesman, who declined to comment on it.

The soldiers began laying the razor wire in the Polish village of Wisztyniec, according to a local Border Guard spokeswoman.

The borders of Poland, Russia, and Lithuania meet in the village of wisztyniec. Poland is also a member of NATO and the European Union.

Aleksandrowicz said, “The barrier will be built in several places at the same time” 

There were no attempts to cross into Poland illegally from Kaliningrad in October.

Konrad Szwed, a Border Guard spokesman, said that there has been no barrier along the border but only frequent patrols by border guards.

After World War II, East Prussia became part of the Soviet Union and the exclave of Kaliningrad had a population of one million.

It is also the home of the Baltic Fleet of the Russian Navy. The old architecture of the city of Kaliningrad, along with the maritime and amber museums are some of the tourist attractions.

A major migration crisis took place last year at the Poland-Belarus border, with large numbers of people crossing illegally. A steel wall was erected on the border between Poland and Belarus.

Polish and other EU leaders accused the Belarusian government of orchestrating the migration in order to create chaos and division within the 27 blocs.