Ukraine said Saturday it struck a Russian airbase in the Voronezh region. Russia has not confirmed the attack.

The reactions to the Trump administration’s decision to pause some weapons shipments to Ukraine couldn’t be more illustrative of the conflict: welcomed by the Kremlin, branded “inhumane” by Kyiv.

It was the latest in a series of almost weekly large-scale missile and drone attacks. President Trump said he “didn’t make any progress” with President Vladimir V. Putin of Russia.