Russian forces, meanwhile, pounded four Ukrainian cities in nighttime attacks that officials said killed a child.

Russian forces have attacked three Ukrainian cities overnight, killing a child and wounding at least 24 people

The Kremlin said on Monday that it did not rule out the possibility of a meeting between Vladimir Putin and Donald Trump if the Russian and U.S. presidents were both in Beijing at the same time in September.

The parade will come at a key moment for the Ukraine war—just a day after Trump's 50-day deadline for Putin to make peace or face much tougher economic sanctions. Dmitry Peskov, Putin's spokesman, said at a press briefing on Monday that the Trump meeting could take place in Beijing in September,

Ukrainian President Volodymyr Zelenskyy on Tuesday renewed his offer to meet with Russian leader Vladimir Putin and negotiate an end to the war in Ukraine, as delegations from both governments prepared to hold a third round of direct talks.