Ukraine-Russia war latest: Putin warns Russia could provide long-range weapons to attack West - and issues new nuclear threat

That's it for our live coverage of the war in Ukraine for today.

You can scroll through the blog below to catch up on the day's developments.

By Nicole Johnston, Asia correspondent in Beijing

Putin's St Petersburg summit comes right out of the same playbook as China's President Xi Jinping.

So how do you get a read on China's geo-political thinking? One way is by wading through the dry and detailed pronouncements of its president, that's where the nuggets are.

In 2022, Xi said: "The world today is undergoing major changes, unseen in a century.

"The most important characteristic of the world is chaos and the trend is likely to continue."

In the world according to Xi, the time is right to reorder global governance with China at its pinnacle, where it belongs. His view is that the US anchored world order is breaking down.

Many countries in the global south are on board with China, chaffing at the dominance of the US led international system and ready to countenance a shake-up.

Russia is in lock step with China. 

Both countries need each other. Though Russia needs China more, for trade and diplomatic cover.

In this great power rivalry, the China-Russian axis could draw in other regional disrupters like Iran and North Korea.

If that happens it will be a formidable alliance based on hostility towards the US, sympathy for Russia, a deep fear of subversion and in the case of China, a relentless goal to unify with Taiwan.

Ukraine's main hydropower company says it has initiated proceedings to secure damages for Russia's destruction of the Kakhovka dam and power station a year ago today.

State-run Ukrhydroenergo said it estimates the damage to be around €2.5bn (£2.12bn).

The explosion of the dam on 6 June 2023 - which sent huge amounts of water across swathes of southern Ukraine and left thousands of people without drinking water - was met with global outcry and accusations of a war crime.

"The company's actions aim to compensate for the losses caused by the destruction of the Kakhovka hydroelectric power plant," Ukrhydroenergo said in a statement. 

"The company believes that initiating international arbitration process is the most promising way to compensate for the losses." 

The firm said Vladimir Putin, his government and other authorised bodies had been informed.

Volodymyr Zelenskyy and Ukrainian first lady Olena Zelenska have arrived in Normandy for an event to commemorate the 80th anniversary of D-Day.

French President Emmanuel Macron greeted the Ukrainian leader with a hug as he arrived, and the president was applauded as he went to take his place inside the event.

Several other political figures including UK defence minister Grant Shapps embraced Mr Zelenskyy as they greeted him.

Earlier, the Ukrainian president said he was "honoured" to participate in the anniversary event and said he would also take part in "important events and meetings aimed at strengthening our country".

"This event and day serve as a reminder of the courage and determination demonstrated in the pursuit of freedom and democracy," he said.

"Allies defended Europe's freedom then, and Ukrainians do so now. Unity prevailed then, and true unity can prevail today."

Earlier today we reported claims by Russian officials that Ukrainian drones hit an oil refinery and fuel depot in Russian border regions.

Rostov regional governor Vasily Golubev said an overnight drone attack struck the Novoshakhtinsk refinery, causing a fire to erupt. 

Meanwhile the governor for Belgorod, a Russian border region which has come under frequent Ukrainian fire during the war, said a drone hit an oil depot and caused an explosion.

No casualties were reported in either attack.

The trial of a US soldier accused of stealing is under way in Russia's far eastern city of Vladivostok.

Staff Sergeant Gordon Black flew to the city to see his girlfriend last month but was arrested after she accused him of stealing from her, US and Russian officials said.

The 34-year-old, who was on leave at the time, faces up to five years in prison if found guilty.

The US army said the soldier had not been given official clearance to travel to Russia's far east.

According to Russian news agency RIA, Sgt Black will give evidence during the trial and respond to the allegations against him.

He has been cooperating with authorities, the report said.

Following today's court session, Sgt Black's girlfriend, Alexandra Vashchuk, told reporters "it was a simple domestic dispute" during which the soldier "became aggressive and attacked" her.

"He then stole money from my wallet and I didn't give him permission to do it," she said.

Joe Biden has just addressed the crowds at the US national D-Day commemoration in Normandy, alongside French president Emmanuel Macron.

The US president began with a retelling of the devastation and evil unleashed on the world by Hitler and told the stories of some veterans in the audience.

"Every one of them knew the probability of dying was real, but they did it anyway," he said.

Mr Biden prayed that America never forgets the importance of alliances, noting NATO as the "greatest military alliance in the history of the world".

"Isolationism was not the answer 80 years ago, and it is not the answer today," he said.

"We know the dark forces that these heroes fought against 80 years ago, they never fade." 

He added: "The struggle between dictatorship and freedom is unending. Here in Europe we see one stark example. Ukraine has been invaded by a tyrant bent on domination."

Mr Biden continued: "Make no mistake, the autocrats of the world are watching closely.

"To surrender to bullies, to bow down to dictators, is simply unthinkable. Were we to do that, it means we would be forgetting what happened here on these hallowed beaches.

"History tells us that freedom is not free: If you want to know the price of freedom, come here to Normandy and look."

Russia has detained a French national on suspicion of collecting information on Russian military activity, investigators have said.

The man had visited the country repeatedly over several years, Russia's Investigative Committee said.

He's also said to have held meetings with Russian citizens.

The man has not been named.

The outcome of the US election this November is unlikely to have any impact on Washington's policy towards Russia, Vladimir Putin has said.

In comments cited by the Russian embassy in the UK, the Russian president said the Kremlin does "not think there will be any serious changes".

"You know perfectly well that the current developments in the US are political infighting; they are burning themselves out, their state and their political system," he said.

Democrat Joe Biden and Republican Donald Trump are their parties' presumptive nominees for the looming election.

Several polls are putting Trump ahead of Mr Biden, despite his recent criminal conviction.

Earlier this year, Mr Putin said he would prefer to see Mr Biden re-elected to the White House as he is "more experienced". 

But he has also enjoyed a previous good relationship with Trump, who has often praised his leadership. 

Hungary will attend a Ukraine peace summit in Switzerland next week despite Budapest strengthening its ties with Moscow.

Foreign minister Peter Szijjarto confirmed at an economic forum in St Petersburg that his country would be represented at the summit on 15 June.

The summit is aimed at building support among dozens of countries for a 10-point peace proposal from Volodymyr Zelenskyy, which includes Russian troops fully withdrawing from Ukrainian territory.

Russia has not been invited, and has branded it a waste of time.

Hungary, an EU and NATO member, has often pushed back against sending Western aid to Ukraine and has been critical of sanctions on Russia.

Vladimir Putin and Hungarian Prime Minister Viktor Orban also reaffirmed their commitment to bilateral ties during a meeting in October.