Russia's offensive in eastern Ukraine continues; Ukrainian troops fighting back

Ukraine's military said on Sunday its forces had repelled seven enemy attacks in eastern Ukraine in the preceding 24 hours as intense fighting with Russian forces continues in the region.

Russian troops intensified their artillery attacks on Lysychansk along the Donets River, facing the key city of Severodonetsk.

Video footage taken on Sunday shows a government building damaged as a result of the shelling. Police said Russian troops had shelled central Lysychansk, damaging residential buildings and infrastructure.

In Severodonetsk, however, Ukrainian troops are fighting back.

Luhansk Governor Serhiy Haidai said on social media on Sunday that Russian forces had previously held 70 percent of the city. He said they had been repelled in the preceding two days, and Ukraine had regained control of 50 percent of the city.

Ukrainian forces appear set to gain ground in Severodonetsk as they seek to retake other regions in eastern Ukraine.

The Joint Forces Task Force reported on social media on Sunday that its troops had destroyed Russian tanks and shot down a combat helicopter in the Donetsk and Luhansk regions.

The Institute for the Study of War, a US think tank, on Sunday claimed that Ukrainian forces continue to conduct successful counterattacks against Russian positions throughout Ukraine as the invading forces concentrate their efforts on capturing Severodonetsk.