The overnight strikes come as Russia hosts an expanded BRICS summit in Kazan with leaders including Indian PM Narendra Modi and Chinese President Xi Jinping expected to attend.
A Russian air force commander who was blamed for a devastating attack on a Ukrainian shopping centre has been found bludgeoned to death with a hammer.
Ukraine's military intelligence named Golenkov as one of those responsible for a lethal Russian missile attack on a shopping mall that killed 22 people.
The pilot, named as Dmitry Golenkov, was said to be involved in the missile strike on civilians at Amstor mall in the Ukrainian city of Kremenchuk, on June 27, 2022.