Earlier, Gladkov said Belgorod was hit by drone attacks overnight, following an incursion Monday claimed by Russians partisans aligned with the Ukrainian army.

The Freedom of Russia Legion and Russian Volunteer Corps earlier said they had "fully liberated the settlement of Kozinka" and "entered Grayvoron," after crossing from Ukraine into Belgorod on Monday.

On Tuesday, Gladkov urged Grayvoron residents not to return to their homes until the operation was completed.