The Russian government has dismissed an “absurd” peace plan for Ukraine put forward by two of Donald Trump’s associates as a new ceasefire holds in the country.

Vladimir Putin’s spokesperson said he had not heard of the proposal, backed by a Ukrainian opposition politician, until he saw media reports.

The plan would entail Russian forces withdrawing from eastern Ukraine and Ukrainian voters deciding in a referendum whether Crimea would be “leased” to Russia for a term of 50 or 100 years.

But the Kremlin has repeated that it will not return the Black Sea peninsula, which it annexed in 2014, to Ukraine and insisted its status is not up for discussion.

​Dmitry Peskov, the Russian President’s spokesman, called the suggestion absurd and said: “There's nothing to talk about. How can Russia rent its own region from itself?”

The proposals were drawn up by opposition Ukrainian politician Andrii Artemenko and sent to Mr Trump’s personal lawyer Michael D Cohen and Felix Sater, a Russian-born real estate developer who formerly advised the US President’s corporation.

Mr Artemenko’s pro-Russian opposition movement is being aided by Mr Trump’s former campaign manager Paul Manafort, the New York Times reported.

His proposals, which would lead to the lifting of sanctions, were delivered to Michael Flynn’s office in the White House before he was forced to resign from his post as national security advisor, Mr Cohen said.

Donald Trump is questioned over whether he ordered General Flynn to discuss sanctions with Russia

The proposals were revealed as a new ceasefire came into effect in Ukraine, where almost 10,000 people have been killed in the ongoing war between government forces and separatist rebels.

The conflict started in 2014 following Kiev’s “Maidan” protests, which ousted Russia-friendly President Viktor Yanukovych, but sparked counter-demonstrations that escalated in eastern Ukraine.

A peace plan drawn up in 2015 in Minsk, Belarus, has been repeatedly violated by both sides, with escalating fighting prompting a new ceasefire attempt that came into effect on Monday.

Russia has denied allegations by the West and Nato of sending troops and weapons over the border, including the missile launcher that downed a Malaysia Airlines passenger plane, but an executive order by Mr Putin has made its political support for the rebels clear.

He declared that all birth certificates and other documents issued by militant authorities in the self-declared “People’s Republics” of Donetsk and Luhansk would be formally recognised by the Russian government, while offering all Ukrainian residents of the territories visa-free travel.

Ukraine’s ministry of foreign affairs condemned the move, saying it constituted “recognition of the Russia-controlled illegal authorities on the occupied Ukrainian territories of Donbas”.

“The Russian side has yet again violated Ukraine's state sovereignty and territorial integrity, Russia's international commitments, as well as the core idea and principles of the Minsk agreements,” a spokesperson added.

Russian military activity in Crimea Show all 11 1 /11 Russian military activity in Crimea Russian military activity in Crimea Ukraine-russian13-ap.jpg Russian, right, and Ukrainian navy sailors are deployed outside a Ukrainian Coast Guard base in Balaklava near Sevastopol, Crimea (AP) AP Russian military activity in Crimea Ukraine-russian9-ap.jpg An unidentified armed man patrols a square in front of the airport in Simferopol, Ukraine (AP) AP Russian military activity in Crimea Ukraine-russian12-ap.jpg A soldier rests atop a Russian armored personnel carriers with a road sign reading "Sevastopol - 32 kilometers, Yalta - 70 kilometers", near the town of Bakhchisarai, Ukraine (AP) AP Russian military activity in Crimea Ukraine-russian11-rtp.jpg Armed Russian navy servicemen surround a Ukrainian border guard base in Balaclava, in the Crimea region (Reuters) Reuters Russian military activity in Crimea Ukraine-russian10-afpgt.jpg Unidentified soldiers block a road to Ukrainian military airport Belbek not far from Sevastopol (AFP/Getty Images) AFP/Getty Images Russian military activity in Crimea Ukraine-russian7-rt.jpg Sea gulls perch onboard a Russian military vessel anchored at a navy base in the Ukrainian Black Sea port of Sevastopol (Reuters) Reuters Russian military activity in Crimea Ukraine-russian6-afpgt.jpg Activists of the Russian Bloc party guard the road to Ukrainian military airport Belbek not far from Sevastopol (AFP/Getty Images) AFP/Getty Images Russian military activity in Crimea Ukraine-russian8-rt.jpg Ukrainian police walk near the Crimean parliament building in Simferopol. Ukraine said on Thursday it would regard any movements by Russian military in Crimea outside the Russian Black Sea fleet's base in Sevastopol as an act of aggression. (Reuters) Reuters Russian military activity in Crimea Ukraine-russian-navy1-rt.jpg Armed Russian navy servicemen surround a Ukrainian border guard base in Balaclava, in Crimea region (Reuters) Reuters Russian military activity in Crimea Ukraine-russian4-ap.jpg An unidentified gunman holds his assault rifle ready while he and others block the road toward the military airport at the Black Sea port of Sevastopol in Crimea (AP) AP Russian military activity in Crimea Ukraine-russian3-ap.jpg A local resident smiles preventing people from going too close to unidentified gunmen blocking the road toward the military airport at the Black Sea port of Sevastopol in Crimea (AP) AP

A German government spokesman said the move was “a stark contradiction to all that was agreed in Minsk” and “totally unacceptable” and France also voiced its opposition.

But the Russian government claimed the executive order was taken for humanitarian reasons, to facilitate the movement of refugees from separatist-controlled Ukraine into Russia, and complied with international law.

Mr Putin’s order was released hours after the American Vice President told an international conference the US would “hold Russia accountable” for its actions.

Mr Trump made a series of warm statements towards the Russian President during his campaign and has dismissed allegations of Kremlin interference in the election, but has adopted a more combative tone in recent days following international pressure over Ukraine.

The Washington-based Institute for the Study of War issued a report warning that recent “Russia manoeuvring” in Ukraine posed a growing risk to American interests.

“Russia may have assessed that it does not require a full-fledged separatist insurgency in eastern Ukraine anymore, as it sees a political opportunity to force Kiev into accepting and legitimising the occupied territories of Donbas on Russia's terms,” researchers said.