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.

Dozens of Russian military aircraft have been destroyed in an unprecedented large-scale drone attack deep inside Russia, a Ukrainian official has said. Codenamed ‘spider web’, the operation saw first-person view (FPV) drones smuggled deep inside Russian territory,

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.

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.

Kyiv also suffered a damaging blow when a Russian missile struck a Ukrainian military training base, killing at least 12 soldiers. Hours before that strike, Russia launched what Ukrainian officials said was the largest combined overnight aerial assault on the country since the start of the war.

While world leaders bicker over the prospects for peace, the deadliest conflict in Europe since World War Two is heating up fast.

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.

With diplomatic efforts to reach a cease-fire appearing remote, and President Trump apparently abandoning the process, Russia has been escalating its assaults on Ukrainian cities and on the battlefield.

"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.

Russia and Ukraine swapped hundreds more prisoners on Sunday, the Russian defense ministry said. The announcement came hours after a massive Russian drone-and-missile attack targeted Ukraine.