Ukrainian forces were gradually pushing Russian forces out of the border Sumy region, where Moscow was able to establish a foothold in recent weeks, president Volodymyr Zelensky said.“Our units in Sumy region are gradually pushing back the occupiers,

Meanwhile, systematic shelling by Russian forces in Ukraine’s eastern Donetsk region killed 10 civilians and injured 31 from June 7 - 10. Russia launched a massive attack on Ukraine overnight into June 9,

Apart from drones, 20 missiles of various types were fired at different parts of Ukraine, according to the air force, which said the barrage targeted mainly central and western areas of Ukraine.

Ukraine's president says a new prisoner exchange with Russia is ongoing and will take days, as both sides continue launching hundreds of attack drones.

Drones are “ubiquitous, because they are quite useful, and they're demonstrating that every day in Ukraine,” one analyst told NBC News.