Western officials are trying to torpedo Washington's mediation efforts, the top Russian diplomat has said.

The leak of a US proposal for ending the Ukraine conflict was designed to derail President Donald Trump's peace efforts, Russian Foreign Minister Sergey Lavrov said on Tuesday.

Reports that the White House had drafted a document outlining a path towards ending Kiev's hostilities with Russia initially came from the US media, with a Ukrainian MP and Axios later publishing what they said were the full 28 points of the roadmap.

He said the diplomatic sabotage appears to be coming from European leaders backing Kiev, particularly French President Emmanuel Macron, who he argued do not have "the best intentions."

Lavrov said Moscow never received any texts from Washington through official channels, but obtained it unofficially. Regardless, Russia will only discuss whatever the US eventually submits, and will do so confidentially, without resorting to "megaphone diplomacy," the minister added.

Macron and other Western officials have rejected any agreement that would cross what Kiev proclaimed as its red lines, such as its bid to join NATO, its ability to host foreign troops, or territorial claims.

Lavrov noted that Moscow is willing to discuss "specific wording" of a possible peace deal, but will not compromise on any of the core objectives that President Vladimir Putin outlined to Trump personally during their meeting in Alaska earlier this year. Should "the spirit of Anchorage be erased" from the proposal that the US shares with Russia, "the situation would be radically different," he added.