Delegations from Russia and Ukraine ended their latest peace talks on Monday in Turkey after just over an hour, Ukrainian President Volodymyr Zelenskyy and Russian state media said.

Speaking in Vilnius, Lithuania, Zelenskyy said both sides "exchanged documents through the Turkish side, and we are preparing a new release of prisoners of the war.”

Ukrainian Defence Minister Rustem Umerov said after the talks that Kyiv proposed to hold a next round of talks with Russia before the end of June.

"We propose to the Russian side to hold a meeting by the end of this month, from 20th to 30th of June," said Umerov, adding that the delegations should try to agree a meeting between presidents Zelenskyy and Vladimir Putin.

Expectations were low for any breakthrough on ending the three-year-old war after a string of stunning attacks over the weekend.

Kyiv officials said a surprise drone attack on Sunday damaged or destroyed more than 40 warplanes at air bases deep inside Russia, including the remote Arctic, Siberian and Far East regions more than 7,000 kilometres from Ukraine.

The complex and unprecedented raid, which struck simultaneously in three time zones, took over a year and a half to prepare and was “a major slap in the face for Russia’s military power," said Vasyl Maliuk, the head of the Ukrainian security service who led its planning.

Zelenskyy called it a “brilliant operation” that would go down in history. The operation destroyed or heavily damaged nearly a third of Moscow’s strategic bomber fleet, according to Ukrainian officials.

Russia on Sunday fired the biggest number of drones – 472 – at Ukraine since the war began in 2022, Ukraine’s air force said, in an apparent effort to overwhelm air defences. That was part of a recently escalating campaign of strikes in civilian areas of Ukraine.

In Lithuania, Zelenskyy said a new release of prisoners of war was being prepared after the Istanbul meeting. The previous direct talks on May 16 also led to a swap of prisoners, with 1,000 on both sides being exchanged.

Ukraine also handed Russia an official list of children it says were forcibly deported and must be returned, said Andriy Yermak, head of Zelenskyy’s office.

Turkish Foreign Minister Hakan Fidan chaired the peace talks at Istanbul's Ciragan Palace, a residence dating from the Ottoman Empire.

The talks aimed to discuss both sides’ ceasefire terms, he said, adding that "the whole world’s eyes are focused on the contacts and discussions you will have here.”

US-led efforts to push the two sides into accepting a ceasefire have so far failed.

Ukraine accepted that step, but the Kremlin effectively rejected it.

The Ukrainian delegation was led by Umerov, while Vladimir Medinsky, an aide to Putin, headed the Kremlin team.

The Russian and Ukrainian delegations, each numbering more than a dozen people, sat at a U-shaped table across from each other with Turkish officials between them. Many of the Ukrainians wore military fatigues.

Recent comments by senior officials in both countries indicate they remain far apart on the key conditions for stopping the war.

The Institute for the Study of War, a Washington-based think tank, said on Sunday that “Russia is attempting to delay negotiations and prolong the war in order to make additional battlefield gains.”

The relentless fighting has frustrated US President Donald Trump’s goal of bringing about a quick end to the war. A week ago, he expressed impatience with Putin as Moscow pounded Kyiv and other Ukrainian cities with drones and missiles for a third straight night. Trump said on social media that Putin “has gone absolutely CRAZY!”

A round of renewed direct talks, held May 16, also in Istanbul, ended after less than two hours.

While both sides agreed on a large prisoner swap, there was no breakthrough. (AP, additional reporting by AFP)