The Kremlin on Tuesday denied claims by U.S. President Donald Trump's special envoy for Ukraine that Russia was stalling in peace talks, adding that Moscow had fulfilled all the agreements reached so far in the negotiations.

Russia and Ukraine exchanged more long-range drone attacks that have become a staple of the more than three-year war, officials said Friday, as Russian President Vladimir Putin said Moscow is ready for a fresh round of direct peace talks in Istanbul.

Russia is ready to hold a third round of peace talks on the war in Ukraine, Russian President Vladimir Putin told reporters on June 27, without specifying if he would directly participate in the negotiations.