The Russian Defense Ministry claimed its troops resisted a “large-scale” attack from Ukrainian forces in the eastern Donetsk region, heightening speculation that Kyiv will soon launch a spring counteroffensive that could swing the course of the conflict.

Both Ukraine and Russia have engaged in intense information campaigns to sway public opinion and mislead their opponents about their battle plans. Monday’s announcement from the Russian side was no exception: The Russian military claimed in a statement to have killed 250 Ukrainians and destroyed armored vehicles used in the assault, but provided scant evidence.

A spokesperson for the Ukraine Armed Forces, Bohdan Senyk, told CNN that Ukraine does “not have information” on a purported “large-scale offensive” in Donetsk.

Moscow is known to make inflated claims about Ukrainian losses. CNN has been unable to independently verify the claim.

In a post on its official Telegram feed, the ministry said the assault took place at “five section of the front in the southern Donetsk direction.”

The ministry claimed the goal of the Ukrainian operation was “to break through” Russian defenses in what it considered to be “the most vulnerable area of the front.”

At the time of the attack, Russia’s top general Valery Gerasimov “was at one of the forward command and control posts,” the statement added.

Gerasimov, who is chief of Russia’s General Staff, was put in overall command of Russian military operations in Ukraine early this year. He has come under public criticism from the head of the Russian private military company Wagner for supposedly running the war from a comfortable office.

Further south, a Russian-appointed official in Zaporizhzhia said Ukrainian troops were attempting to break through a defense line to reach the coast of the Sea of Azov.

“The goal of the [Ukraine Armed Forces] militants is to reach the Azov Sea coast and cut the land corridor,” Vladimir Rogov said, according to Russian state media outlet RIA Novosti.

He claimed that Ukrainian troops have increased the intensity of their shelling, and fired Storm Shadow missiles. “They are launched in large quantities, which means Ukrainian militants and terrorists have ammunition in sufficient quantity.”