With 41 military aircraft impacted, the Ukrainian drone attack was described by some commentators as Russia's "Pearl Harbor." The attack on Pearl Harbor in December 1941 was a surprise air raid by Japan on the U.S. during World War II. Kyiv's assault follows ground advances by Moscow troops in recent days in Ukraine's Sumy border region.

Russian Foreign Minister Sergei Lavrov and U.S. Secretary of State Marco Rubio discussed on Sunday prospects for settling the conflict in Ukraine and Russia-Ukraine talks set for Monday in Turkey, Lavrov's ministry said.

Russia’s Defense Ministry said on Sunday that Ukrainian drones attacked airfields in five regions and that several aircraft had caught fire.

The attack followed a night of bombardment, with Russia launching 472 drones, Ukraine’s air force said. Earlier Sunday, Ukraine’s army said a Russian missile strike on an army training unit killed at least 12 Ukrainian service members and injured 60.

By making harsh, uncompromising demands in peace talks with Ukraine while continuing to pummel it with waves of missiles and drones, Russian President Vladimir Putin is sending a clear message: He will only accept a settlement on his terms and will keep fighting until they're met.

"The head of the Security Service of Ukraine, Vasyl Maliuk, presented a report on today's operation. An absolutely brilliant result," commented Ukrainian President Volodymyr Zelensky on social media.

The Russian economy faces a banking collapse, companies forgoing dividend payouts and a sharp downturn in growth.

Ukraine reportedly launched a drone attack on a Russian military base in Siberia, targeting nuclear-capable long-range bombers, marking the conflict's deepest strike into Russian territory. The attack,