A spokesperson for Ukraine's southern military command told NBC News that Russian troops were retreating from some areas where Ukraine launched a counter-offensive overnight.
Ukrainian forces began the counter-offensive to retake the Russian-occupied territory of Kherson, the military command announced earlier.
Meanwhile, the U.N.'s nuclear watchdog, the International Atomic Energy Agency, is set to visit Ukraine's Zaporizhzhia nuclear power plant this week after months of growing international alarm over the fighting surrounding the facility, which has been occupied by Russian forces since March.
Russian forces continued to shell military and civilian infrastructure in the eastern Donetsk region, killing civilians overnight, the regional governor said.