The Ukrainian army and Moscow-backed separatists said Tuesday they had begun to withdraw their troops from a key area in the war-torn east ahead of a high-stakes summit with Russia.

The long-awaited pullback is a precondition for the first face-to-face talks between Russian President Vladimir Putin and his Ukrainian counterpart Volodymyr Zelensky, to be mediated by the leaders of France and Germany.

"The process of troop withdrawal began by both sides... in the area of Zolote-4" in the Lugansk region, Ukraine's army said on Facebook.

Ukrainian nationalists have staged a series of protests against President Volodymyr Zelensky's peace process with Moscow-backed separatists
Ukrainian nationalists have staged a series of protests against President Volodymyr Zelensky's peace process with Moscow-backed separatists AFP / GENYA SAVILOV

Monitors from the Organisation for Security and Cooperation in Europe confirmed the move.

"Today the sides have just resumed the withdrawal of troops and arms in Zolote," Martin Sajdik, an OSCE special representative, told journalists.

"I think that we did a lot to bring about the Normandy (summit)," Zelensky told the Interfax-Ukraine news agency, referring to the name given to the internationally-mediated talks.

Ukraine President Volodymyr Zelensky has agreed to withdraw troops in key parts of the war-torn east of the country
Ukraine President Volodymyr Zelensky has agreed to withdraw troops in key parts of the war-torn east of the country AFP / TIMOTHY A. CLARY

The rival forces also need to withdraw troops from the village of Petrivske in the Donetsk region for the summit to go ahead.

'Surrender'

Since coming to power in May, comedian-turned-president Zelensky has sought to revive a peace process to end a five-year-old separatist conflict in eastern Ukraine that has claimed some 13,000 lives.

But those efforts have stalled as Kiev's forces and the separatists have repeatedly failed to pull back troops from the frontline because of exchanges of gunfire.

Zelensky's peace plan including the troop pullback has been strongly criticised by many in Kiev, especially war veterans and nationalists.

13,000 people have died since the conflict in eastern Ukraine broke out in 2014
13,000 people have died since the conflict in eastern Ukraine broke out in 2014 AFP / Sergei SUPINSKY

Some 300 Ukrainians heeded the calls of veterans and nationalists to protest outside the presidential office against the withdrawal of troops, chanting: "No surrender!".

The same calls have been made over the past few weeks, as thousands of Ukrainians including Zelensky's predecessor Petro Poroshenko have protested in the capital Kiev and other cities.

Various nationalist organisations even deployed their own troops to Zolote in an effort to prevent a retreat of Ukrainian forces.

Map of Ukraine showing regions controlled by pro-Russian separatists and Crimea which was annexed by Russia
Map of Ukraine showing regions controlled by pro-Russian separatists and Crimea which was annexed by Russia AFP / Sébastien CASTERAN

Last week the 41-year-old Ukrainian president was forced to personally travel to Zolote in an effort to persuade his nationalist critics not to stand in the way of the peace process.

"We have to look for ways and work to end the war," Zelensky said Saturday during his trip to the village.

"There will be no surrender in any case... I am sure we will succeed and Ukraine will be united again."

Special status

Putin's aide Vladislav Surkov expressed satisfaction about the move.

"If everything works out in Zolote, similar procedures in Petrivske should follow immediately," he told Russia's TASS news agency.

Political opponents were quick to criticise Zelensky on Tuesday.

Ivanna Klympush-Tsintsadze, a lawmaker from Poroshenko's party, called the troop withdrawal a "capitulation on the Kremlin's conditions".

Another opposition party Golos condemned Zelensky for breaking his own promise to withdraw troops only after fighting stops for seven days, while there was shooting across the frontline as recently as the weekend.

"The withdrawal of troops without fulfilling the conditions of the 7-day silence regime is unacceptable," the party said in a statement.

"Such actions of the president and his team are a mistake," it said.

In the run-up to the planned summit, Ukrainian, Russian and separatist negotiators also agreed on a roadmap that envisages a special status for the separatist territories if they conduct free and fair elections under the Ukrainian constitution.

Critics say the proposal favours Russia but Zelensky has pledged not to betray Ukraine's interests.

Ties between Ukraine and Russia were shredded after a bloody uprising ousted a Kremlin-backed regime in 2014.

Moscow went on to annex Crimea and support insurgents in eastern Ukraine.