The Ukrainian military said Russian forces launched 18 air strikes, five missile strikes and 53 attacks from multiple rocket launchers between Thursday and Friday morning.
According to the General Staff statement, Russia was concentrating the bulk of its offensive operations in Ukraine's industrial east, focusing on the cities and towns of Lyman, Bakhmut, Avdiivka and Marinka in Donetsk province.
Most of Friday's battlefield reports concerned the four Ukrainian provinces Russia annexed in September: Donetsk, Luhansk, Zaporizhzhia and Kherson.
Russian President Vladimir Putin has ordered his military to gain complete control of the provinces, while Ukraine has indicated it will soon launch a counteroffensive to take back more territory.
Russia also annexed the Crimean Peninsula from Ukraine in 2014, a move that most of the world also regarded as illegal. Ukrainian President Volodymyr Zelenskiy has vowed to regain all Russian-occupied areas.
In the latest fighting, the Ukrainian military said it downed a Russian Su-25 ground attack jet near Marinka. A video showed a big explosion as the plane slammed into the ground, with its pilot descending on a parachute. The Russian military, in keeping with its general silence on losses, didn't confirm the warplane's downing.
Russia's eight-month campaign to take Bakhmut and Ukraine's determination to defend the city have produced the longest and potentially bloodiest battle of the war that Putin started in February 2022.
The Wagner Group, which has appeared to take the lead in the Bakhmut fighting, has frequently complained about the regular Russian military's strategy as well as its failure to provide sufficient ammunition and other support.
