Russia-Ukraine crisis: Moscow proxies hold breakaway polls in Kyiv

Kremlin-held regions of eastern and southern Ukraine entered the second day of voting to become part of Russia on Saturday, in referendums dismissed as a "sham" by US President Joe Biden.

The voting on whether Russia should annex four regions of Ukraine began on Friday, dramatically raising the stakes seven months after Moscow's troops attacked it.

The same day polling got under way. UN and Ukrainian officials also revealed what they said was more evidence of Russian "war crimes" — including executions and torture.

"Russia's referenda are a sham — a false pretext to try to annex parts of Ukraine by force in flagrant violation of international law," Biden said.

"We will work with our allies and partners to impose additional swift and severe economic costs on Russia."

It even prompted a reaction from Beijing, Moscow's closest ally since the war began in February.

Chinese Foreign Minister Wang Yi — in comments made to his Ukrainian counterpart Dmytro Kuleba at the UN General Assembly on Friday — stated that the "sovereignty and territorial integrity of all countries must be respected".

Ukrainian forces said that they were clawing back territory from Moscow-backed separatists in the very lands Russia wished to assimilate.

Voting is being held in the Russian-controlled areas of Donetsk and Luhansk in the east, and Kherson and Zaporizhzhia in the south.

Authorities there are going door-to-door for four days to collect votes. Polling stations will then open on Tuesday, for residents to cast ballots on the final day.

It was also possible to vote at the building in Moscow that represents the Donetsk breakaway region.

Leonid, a 59-year-old military official, told AFP he was "feeling happy".

"Ultimately, things are moving towards the restoration of the Soviet Union. The referendum is one step towards this."

The vote was announced earlier this week after a Ukrainian counter-offensive seized most of the northeastern Kharkiv region, bringing hundreds of settlements back under Kyiv's control after months of Russian occupation.

The four regions' integration into Russia would represent a major escalation of the conflict, as Moscow would consider any military move there as an attack on its own territory.

The referendums are reminiscent of the one held after Russia annexed Ukraine's Crimea in 2014.

On Friday, Ukrainian President Volodymyr Zelensky denounced the polls.

"The world will react absolutely justly to the sham referenda," he said, describing them as "crimes against international law and the law of Ukraine".

Earlier on Friday, G7 nations said that the polls would "never" be recognised, as they had "no legal effect or legitimacy".

UN investigators accused Russia of committing war crimes on a "massive scale" in Ukraine — listing bombings, executions, torture and horrific sexual violence.

Erik Mose of the Commission of Inquiry — an investigative team set up by the Security Council in March — said they had seen evidence of a "large number of executions" and the assaults on children.

In eastern Kharkiv region, Ukrainian officials said on Friday that they had finished exhuming 447 bodies from a site near the city of Izyum, which was recaptured from Russian forces.

"Most of them have signs of violent death, and 30 have signs of torture," said Kharkiv regional governor Oleg Synegubov.

"There are bodies with rope around their necks, with their hands tied, with broken limbs and gunshot wounds."

The Kremlin has accused Kyiv of fabricating evidence of the alleged war crimes.

This week, Putin warned that Moscow would use "all means" to protect its territory — which former Russian leader Dmitry Medvedev said (on social media) could include the use of "strategic nuclear weapons".

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Moscow began its mandatory troop call-up on Thursday, after Putin called for about 300,000 reservists to bolster the war effort.

However, men were leaving Russia in droves before they were made to join, with flights to neighbouring countries booked up for days to come.

Some, however, could not avoid the summons.

Andrei, who turned 18 last week, was called up after being detained during the anti-mobilisation protests in Moscow.

He recently began university, and should not have been caught up in the recruitment drive, according to Russian Defence Minister Sergei Shoigu who had said students would not be called up.

"As we say, Russia is a country of endless possibilities," Andrei joked bitterly.

Mikhail Suetin, 29, also detained at an anti-mobilisation protest, was also summoned.

"To be told 'tomorrow you will go to war', " he said, "that was a surprise."