The Ukrainian military says that Russian shelling across the border into the northern regions of Sumy and Chernihiv resumed Sunday.
In its operational note, the General Staff of the Armed Forces also said that in Donbas, "the main goal of the enemy is to surround our troops in the areas of Lysychansk and Severodonetsk and to block the main logistics routes."
(Russian forces) are trying to gain a foothold on the north-eastern outskirts of the city of Severodonetsk, conducting assault operations in the direction of the city center," it said.
Ukrainian troops continue to maintain positions in Severodonetsk and neighboring Lysychansk, despite constant shelling and airstrikes.
The General Staff said Russian efforts to degrade Ukrainian defenses further west continued, with artillery, mortar and multiple rocket systems being used against several towns and villages in the direction of Bakhmut.
It said that Russian efforts to cross the Siverskyi Donets River in certain areas continued.
Among several towns and villages in northern Ukraine that were hit by cross-border shelling were Hirsk and Hrinivka in Chernihiv and Bachivsk and Seredyna-Buda in Sumy. Analysts say Russian attacks on these areas are designed to prevent Ukrainian forces from being redeployed to the main fronts in Donbas.
The military gave no further details about a Ukrainian counter-offensive in the southern regions of Kherson and Mykolaiv that was launched on Saturday. But it said Russian bombardments of settlements near the city of Kryvyi Rih, also in the south, had used mortars, air strikes and artillery. The front lines in that region have changed little in recent weeks.