MOSCOW, December 14. /TASS/. Ukraine is setting up pyramidal anti-tank concrete barriers on the border with Russia and Belarus.

Lieutenant-General Sergey Nayev, the commander of the Ukrainian army’s northern group, showed how they are put up in a video uploaded to his Telegram channel.

Ukrainian military personnel are seen placing pyramidal blocks, commonly known as "dragon's teeth" in several rows, and digging trenches with the help of earth-moving machines.

"In the Chernigov region, as well as in the entire northern operational zone, the situation is stable and under control. However, on the most vulnerable routes of approach, work is in full swing to equip and fortify the positions of the first and second lines of defense," Nayev wrote.

Earlier he said that Ukrainian troops were actively building fortifications and laying mines in the north of the country. The density of minefields has increased 16 times since June 2022. In October, the head of the Kiev city military administration, Sergey Popko, said that 1,000 kilometers of several defense lines had been created near the Ukrainian capital. In November, the former head of the press service for the Ukrainian army’s General Staff, Vladyslav Seleznyov, said that the Ukrainian military had laid half a million mines in four regions bordering Russia and Belarus.

The head of the antimine action center of the Belarusian Armed Forces, Lieutenant-Colonel Ruslan Girilyuk, said that combing Ukrainian territory along the border with Belarus and clearing it of mines would be a colossal effort.