Turkish officials say Ukraine and Russia are set to sign a deal to unblock grain exports and relieve a global food crisis, as a critical Russian gas pipeline to Europe reopened.
The United States hailed the deal and urged Russia to implement it.
"We welcome the announcement of this agreement in principle, but what we're focusing on now is holding Russia accountable for implementing this agreement and for enabling Ukrainian grain to get to world markets," State Department spokesman Ned Price told reporters.
"We should never have been in this position in the first place. This was a deliberate decision on the part of the Russian Federation to weaponise food," Mr Price said.
Mr Price applauded diplomacy by UN Secretary-General Antonio Guterres and "the diligent work of our Turkish allies," who in recent years have often been at odds with the United States on issues including Syria and arms purchases from Russia.
He said that the United States was kept abreast of details on the grain deal, which is to be signed Friday.
Food prices have soared around the world, hurting poor countries the hardest, since Russia's invasion of Ukraine, a major grain exporter.
Up to 25 million tonnes of wheat and other grain have been blocked in Ukrainian ports by Russian warships and landmines Kyiv has laid to avert a feared amphibious assault.
Secretary-General Antonio Guterres believes an agreement to let Ukrainian grain enter international markets with a security guarantee will be signed on Friday. He said that that would be the first major step on the road to ending the conflict. Source: Getty / Pacific Press/Pacific Press/LightRocket via Ge
It is the first major agreement between the warring sides since Russia's February invasion of its neighbour.
President Recep Tayyip Erdogan's spokesman Ibrahim Kalin tweeted that the agreement will be signed in Istanbul on Friday under the auspices of the Turkish leader, Mr Guterres and Ukrainian and Russian delegations.
In more good news for global markets, Russia on Thursday restored critical gas supplies to Europe through Germany via the Nord Stream pipeline after 10 days of maintenance.
However, suspicion lingered that the Kremlin would trigger an energy crisis on the continent this winter.
Germany, which is heavily dependent on Russian gas, had feared that Moscow would not reopen the pipeline after the scheduled work and accused Moscow of using energy as a "weapon".
The resumption of gas supplies came a day after Europe unveiled emergency measures to circumvent Russian energy "blackmail".
Klaus Mueller, head of Germany's energy regulator, said that by late morning gas flows were on track to return to 40 per cent of the pipeline's capacity - the same reduced level as before the maintenance work.
The showdown came amid the worst tensions in several years over Russia's invasion of Ukraine.
EU states have accused Russia of squeezing supplies in retaliation for Western sanctions over the war.
Despite efforts within the bloc to reduce dependence on Russian energy supplies, Moscow's closest ally within the European Union, Hungary, announced Thursday it was seeking to increase gas deliveries from Russia.
Foreign Minister Sergei Lavrov said Russia would "consider" Budapest's request for more gas this year after his Hungarian counterpart Peter Szijjarto visited Moscow Thursday.
'Stay in shelters!'
In Kharkiv, prosecutors said three people had been killed and 23 more injured in a Russian missile strike.
"The enemy is firing chaotically and brutally at the city. Stay in shelters!" regional governor Oleg Synegubov wrote on social media.
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US Secretary of State Antony Blinken said the Kharkiv deaths were "the latest in a pattern of Russian atrocities", vowing to hold the perpetrators accountable.
In Kramatorsk in the Donbas region of eastern Ukraine, which has seen some of fiercest fighting, a school that Ukrainian officials said was being used as a food aid storage point was also struck.
Averted nuclear 'catastrophe'
Russian troops invaded Ukraine on February 24 and the war has left thousands dead, forced millions to flee their homes and raised fears of a nuclear disaster.
Moscow accused Ukrainian forces Thursday of having fired on Europe's largest nuclear power plant, which is in Russian-controlled territory, and claimed a "catastrophe" was avoided "by luck".
Ukraine - without responding to the allegations - said Russia was storing heavy weapons and ammunition at the Zaporizhzhia plant and that any accident there could lead to a crisis worse than the 1986 Chernobyl disaster.
Some 15,000 Russians have died in the five-month-old invasion of Ukraine, the US and British spy chiefs said, as they assessed that President Vladimir Putin was suffering far greater losses than expected.
Richard Moore, the head of Britain's MI6 intelligence service, said Thursday that the 15,000 dead was "probably a conservative estimate" and marked a "very bloody nose" for Putin who had expected quick victory.
In an exclusive interview with AFP, Alexander Lukashenko, the strongman leader of Belarus and close Kremlin ally, meanwhile urged Moscow and Kyiv to relaunch negotiations to avoid a nuclear escalation.
"Further (ahead) lies the abyss of nuclear war. There's no need to go there," said the leader of Belarus, which was used by Russian troops in February as a launching pad to attack Ukraine.
'Different' war aims for Russia'
Western powers have stepped up arms supplies to Ukraine but President Volodymyr Zelenskyy has asked for more and speedier deliveries.
Britain became the latest country Thursday to announce it is re-upping military supplies with artillery, "hundreds of drones and hundreds more anti-tank weapons" for Ukraine in the coming weeks.
The announcement came a day after Pentagon chief Lloyd Austin said Washington would send four more M142 High Mobility Artillery Rocket System (Himars), which have notably boosted Kyiv's capabilities.
Shelling killed at least three people in the north-eastern Saltivskyi district in Kharkiv, Ukraine on 20 July, 2022. Source: Getty / Anadolu Agency/Anadolu Agency via Getty Images
In its latest package of sanctions this week, the EU imposed an embargo on Russian gold imports and froze assets at Russia's largest bank.
The bloc followed up Thursday with asset freezes and visa bans on 10 Syrians on Thursday, accusing them of recruiting mercenaries to fight for Russia.
