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As Tuesday draws to a close in Kyiv and in Moscow, here are the key developments of the day:

More than 1,800 civilians have been killed in Ukraine since Russia's invasion began on Feb. 24, . The group has also documented nearly 2,500 injured civilians, though it says actual figures for civilian casualties are likely to be "considerably higher."

A Russian convoy continues moving south toward the town of Izium in eastern Ukraine, , according to the Pentagon. The convoy is believed to be part of Russia's efforts to reposition troops in advance of a major offensive in eastern Ukraine in the coming days. This follows the retreat of Russian troops from Kyiv and other northern cities, , according to Ukrainian President Volodymyr Zelenskyy.

Ukrainian authorities arrested fugitive oligarch and pro-Russian opposition politician Viktor Medvedchuk. Zelenskyy shared , who'd been under house arrest facing accusations of treason but escaped in February.

Russian President Vladimir Putin delivered his first extended remarks about Ukraine since Russian forces withdrew from northern Ukraine. He blamed Kyiv for derailing peace talks and said Russia would and "necessary" objectives of protecting Russian speakers in eastern Ukraine as well Russians at home from a hostile West. Earlier, Austrian Chancellor Karl Nehammer , saying he struggled to get the Russian leader to agree to guarantee humanitarian corridors, let alone a cease-fire.

Western officials are calling for Russian authorities to release the detained opposition activist Vladimir Kara-Murza. The activist, who's been critical of the invasion of Ukraine, was arrested near his Moscow home and . Kara-Murza in 2015 and 2017 fell ill in incidents of suspected poisoning. He'd been close friends with .

In-depth

Meet the trapped in Kyiv suburbs under siege.

The U.S. and India � democracies and friends � .

Romania hasn't always seen itself as a safe haven.

Holocaust museums in Canada, U.S., U.K. and South Africa .

These intricately decorated eggs are raising .

Earlier developments

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