Previously home to more than 100,000 people, Severodonetsk has been largely destroyed following concentrated shelling during the Russian offensive.
UK Defence Intelligence said Gen Dvornikov had probably for a time been acting as over-all operational commander in Ukraine.
The pair are just the latest officials to lose their positions as a result of the course of the war, according to UK intelligence officials, with Lieutenant General Serhiy Kisel, who commanded the elite 1st Guards Tank Army, also said to have been likely suspended for his failure to capture Kharkiv, and Vice Admiral Igor Osipov, who commanded Russia's Black Sea Fleet, said to have likely been fired for the sinking of the cruiser Moskva in April.
For over 30 years, Col-Gen Surovikin's career is said to have been dogged with allegations of corruption and brutality. Ukraine's general staff reported that its troops had some success in the Kherson region, pushing back the Russians from defensive positions near the village of Olhine, as a result of the latest in a series of Ukrainian counter-assaults.
Meanwhile, a Russian strike on a military base in Yavoriv, in western Ukraine, wounded four people, Lviv governorMr Kozitsky said six missiles were fired from the Black Sea, with four hitting their target and two being intercepted andvia a videolink:"We in Ukraine would also like to live the life as we used to and enjoy freedom and this wonderful summer, but we cannot do that because the most terrible has happened - Russia has stolen our peace.
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