Ukraine's border guards dismissed claims from Belarus that it was reinforcing troops on their mutual border, describing the reports as an information operation from Minsk with Moscow's support.
Belarus, a close Russian ally that has provided support for Moscow's 28-month full-scale war in Ukraine, said last week that Kyiv was bolstering its forces along the frontier. The Kremlin said on Monday the report was a cause of concern.
"It is not the first time Belarus offers information about Ukraine presenting a threat and strengthening itself," border guard spokesman Andriy Demchenko told Ukrainian TV. "This is another part of the information operation conducted by Belarus with support by Russia."
He said the border remained a concern, and Ukraine was strengthening it with engineering while maintaining the necessary number of troops to prevent any provocations.
He also said that Belarus had been conducting military exercises since June 21, and that blaming Ukraine for friction at the border could be aligned with those drills.
On Sunday, the Belarus Defence Ministry claimed it had information showing Ukraine had been moving troops, weapons, and military equipment to the border, in particular in Zhytomyr region.
Minsk also said its own forces had deployed additional air defences to protect the border area from drones, after claiming to have shot down a Ukrainian quadcopter earlier last week.
Meanwhile, Russia's Defence Ministry said on Monday that its forces had taken control of two villages in eastern Ukraine.
The ministry said in a statement that the Russian army was now in control of the settlement of Stepova Novoselivka in Kharkiv region, and of Novopokrovske in Donetsk region.

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