The absence of tanks and other heavy military vehicles on Red Square will highlight the heavy toll of the war in Ukraine.

The Nord, a 464-foot vessel, appears to be tied to Aleksei A. Mordashov, a Russian steel mogul who is under American and European sanctions.

Abbas Araghchi, Iran’s foreign minister, met with President Vladimir V. Putin in Moscow. Russia has tried to avoid entanglement in the conflict while remaining a key player in the region.

Another interest-rate cut highlights the narrowing path for the country’s central bank amid the strains of immense wartime spending.