Events to mark the holiday in the occupied territories seem to be an effort to show Russian control of land it has captured.

The unilateral ceasefire coincides with the celebrations in Moscow for the 80th anniversary of victory over Nazi Germany in World War II, Russia’s biggest secular holiday. Kyiv has pressed for a longer-term cease-fire.

Ukraine has discussed ways to pressure Russia into agreeing to a 30-day ceasefire with U.S., French, British and German senior officials, President Volodymyr Zelenskiy's top aide said on Thursday, part of a flurry of diplomacy to try to end the war.