Russian strikes on front-line localities ​in eastern Ukraine ​killed seven people and injured more ​than 20 on Monday, officials said.Prosecutors in Donetsk Region, the focal point of fighting along ‌the 1,200-km (775-mile) ⁠front ⁠line, said three people had died in two ​areas near the contested city of Kostiantynivka.Russia's military ​said this month its forces had captured Kostiantynivka, but Ukrainian officials deny the ​city has changed hands.Read more: Russian strikes kill at least six across Ukraine as Kyiv comes under missile attackA fourth ⁠person was ‌killed near Kramatorsk, a ​heavily defended "fortress" ​city considered critical to Ukraine's ⁠defences. Prosecutors said a total of ​18 people were injured throughout Donetsk ​Region.In adjacent Dnipropetrovsk Region, Governor Oleksandr Hanzha said three people were killed and six wounded in more than 50 drone and artillery attacks on five ‌districts.Two people died near the town of Nikopol, a frequent Russian ​target on ​the north ⁠bank of the Dnipro River. One person was killed near the town of Syneklykove, further ​east.Over the border in Russia's Belgorod Region, a Ukrainian drone struck a commercial building, killing one person and injuring two.Read more: Zelenskyy claims Russia providing satellite intel on US bases and Gulf states to Iran