Turkish presidential spokesperson and US national security adviser also exchange views on regional issues in a phone call.
Leaders paid tribute to the sacrifices and courage of the Ukrainian people, voiced their resolve to keep supplying Kiev with aid and reviled Moscow for its attack on the neighbouring Eastern European nation.
The International Atomic Energy Agency, which is seeking to inspect the Zaporizhzhia plant, has warned of a nuclear disaster unless fighting stops.
Ukraine has said that it needs at least $5 billion per month in the near term to keep its government operating in the face of ongoing Russian onslaught.
"Only together we have the potential to stop the war and to rebuild what Russia has destroyed," Ukrainian President Volodymyr Zelenskyy says.
The US is discussing with Poland a plan under which Polish "peacekeeping" forces without a NATO mandate would enter parts of western Ukraine, Russia's Foreign Intelligence Service claims.
EU Commission Chief Ursula von der Leyen has presented plans for an emergency aid package for Ukraine as fears mount over the buildup of Russian forces at its border.
Moscow accuses UK of "disinformation" while ex-Ukrainian lawmaker Yevheniy Murayev rejects the idea he could be in league with Kremlin as "stupid", given he was placed under Russian sanctions in 2018.
US Secretary of State Blinken and Russian FM Lavrov confirmed that Washington will share written ideas on Moscow's proposals next week amid fears of a Russian invasion in Ukraine.
The EU summit with its Eastern Partnership, excluding Belarus, comes after Ukraine's President Zelenskyy pushed for immediate sanctions.
Ukraine's foreign minister says Moscow's actions and statements are aimed at escalating military tensions and undermining diplomatic efforts to resolve the Russian-Ukrainian conflict.
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