Russia-Ukraine war latest: what we know on day 207 of the invasion

Czech Republic calls for special international tribunal' after Izium mass grave found; Turkish and Indian leaders urge end to war at Asia summit

The Czech Republic, which currently holds the EU presidency, have called for a special international tribunal" after a mass grave was discovered in Izium, a town in north-eastern Ukraine. In the 21st century, such attacks against the civilian population are unthinkable and abhorrent," said Jan Lipavsky, foreign minister of the Czech Republic. More than 440 bodies have been discovered by Ukrainian officials, with some found with their hands tied behind their backs.

Satellite imagery has emerged of the recently discovered mass grave site near Izium. The images, released by Maxar Technologies, show the Forest Cemetery" entrance from March to August of this year.

One of the Russian-held Zaporizhzhia nuclear power plant's four main power lines has been repaired and is supplying the plant with electricity from the Ukrainian grid two weeks after it went down, the UN nuclear watchdog has said. Even though the six reactors at Zaporizhzhia, Europe's biggest nuclear power plant, have been shut down, the plant needs electricity to keep them cool.

US president Joe Biden urged Russian president Vladimir Putin to not use tactical nuclear or chemical weapons in the wake of setbacks in Ukraine. Asked by CBS what he would say to Putin if he was considering using such weapons, Biden said: Don't. Don't. Don't. It would change the face of war unlike anything since world war two." Biden said the US response would be consequential," but declined to give detail.

Indian prime minister Narendra Modi told Putin on Saturday that today's time is not a time for war" when the pair met during a regional Asia summit in Uzbekistan. Putin told Modi he knew of India's concerns" about the conflict, echoing language he had used with Chinese president Xi Jinping the day before. We will do our best to end this as soon as possible," Putin said, while accusing Kyiv of rejecting negotiations.

Speaking to reporters later, Putin vowed to continue his attack on Ukraine despite Kyiv's latest counteroffensive and warned that Moscow could ramp up its strikes on the country's vital infrastructure if Ukrainian forces target facilities in Russia. Associated Press reported that the Russian president said the liberation" of Ukraine's entire eastern Donbas region remained Russia's main military goal and that he saw no need to revise it. We aren't in a rush," he said after the Shanghai Cooperation Organisation meeting in Samarkand.

Turkish president, Recep Tayyip Erdogan, told leaders at the summit that efforts were being made to finalise the conflict in Ukraine through diplomacy as soon as possible". Putin told Erdogan, who has been a key broker in limited deals between Russia and Ukraine, that Moscow was keen to build closer ties with Turkey and was ready to significantly increase" all exports to the country.

Activists from environmental group Greenpeace on Saturday blocked a shipment of Russian gas from unloading at a liquefied natural gas (LNG) terminal in northern Finland, the terminal owner and Greenpeace said. The activists demanded Helsinki stop importing Russian gas after Russia invaded Ukraine on February 24.

The security service of Ukraine said that Russia's federal security service (FSU) officers tortured residents in Kupiansk, a city in Ukraine's Kharkiv region. The Kyiv Independent reports that when FSU officers were in then-occupied Kupiansk, they tortured residents and threatened to send them to minefields and kill their families.