Ukraine presented a draft to Russia that differs from the one put forward during peace talks in Istanbul, Russian Foreign Minister Sergey Lavrov said Thursday.
Lavrov claimed Kyiv presented Moscow with a draft peace deal that contained "unacceptable" elements, but that Russia would nonetheless continue talks and press to secure its own requirements.
Lavrov also accused Ukraine of drawing out and undermining peace talks, in comments published by Interfax news agency.
The Kremlin has said that peace talks between Moscow and Kyiv are not progressing as rapidly as it would like and has accused the West of trying to derail negotiations by focusing on war crimes allegations, which Moscow denies.
"Such inability to agree once again highlights Kyiv's true intentions, its position of drawing out and even undermining the talks by moving away from the understandings reached," Lavrov said, adding that Kyiv's proposals were "unacceptable."
There was no immediate comment from Ukraine. Kyiv has said that talks are needed but it is not willing to give up its sovereignty and territorial integrity.
In a breakthrough, Russian and Ukrainian delegations met for peace talks in Istanbul on March 29 as the war entered its second month with casualties piling up on both sides.
During the talks, Ukrainian officials signaled readiness to negotiate a "neutral status," a key Russian demand, but demanded security guarantees for their country.
Russia, meanwhile, pledged to significantly decrease its military activities toward the Ukrainian cities of Kyiv and Chernihiv to build trust for future negotiations.
Ukraine wants to see countries, including Turkey, as guarantors in a deal with Russia, a Ukrainian negotiator said after the talks.