Ukrainian and Russian officials have said that negotiations between the two countries have stagnated.

Moscow has accused Ukraine of hardening its stance. Russian Deputy Foreign Minister Andrei Rudenko that Kyiv has "practically withdrawn from the negotiation process."

Russian Foreign Minister Sergei Lavrov said that Western countries want to use Ukraine to their strategic advantage. He argued that no peace deal can be made if negotiators focus on the West's concerns rather than the immediate situation in Ukraine.

"We always say that we are ready for negotiations ... but we were given no other choice," Lavrov said.

Ukrainian presidential adviser Mykhailo Podolyak said that talks are "on hold" as Russia is not willing to accept it "will not achieve any goals."

"Russia does not demonstrate a key understanding of today's processes in the world," Podolyak said, according to Ukrainian media. "And its extremely negative role."

Russia's Lavrov says NATO accession for Finland, Sweden makes 'no big difference'

Russian Foreign Minister Sergei Lavrov has said that Finland and Sweden joining NATO would not make "much difference."

"Finland and Sweden, as well as other neutral countries, have been participating in NATO military exercises for many years," Lavrov said.

"NATO takes their territory into account when planning military advances to the East. So in this sense there is probably not much difference. Let's see how their territory is used in practice in the North Atlantic alliance."

Russian deputy PM visits Kherson region

Russian Deputy Prime Minister Marat Khusnullin has visited the Ukraine's southern Kherson region.

RIA Novosti reported that Khusnullin said that the region would take a "worthy place in our Russian family." Kherson is under Russian occupation.

On May 1, Moscow introduced the Russian ruble as official currency in the region.

A few days ago, the Russian-installed local government in Kherson said it plans to appeal to Moscow for the right to become part of the Russian Federation.