This live blog is now closed, you can find our latest coverage of the Russia-Ukraine war in our new live blog

Russian security services have moved swiftly against the Wagner boss,
denouncing Prigozhin for “treachery” and ordering the mercenary
group’s fighters to detain their commander.

The defence ministry also published videos with several senior
military generals who urged Prigozhin to stop what one commander
described as a “coup.”

FSB opens criminal case after Yevgeny Prigozhin accuses Russia’s military of rocket attack and says ‘evil’ leadership must be stopped

Russia’s FSB security service has opened a criminal case for armed mutiny against Wagner’s Yevgeny Prigozhin after the mercenary chief accused the Russian military of targeting his forces and vowed to “destroy” his rivals.

In an extraordinary series of audio clips released late on Friday, Prigozhin claimed that a Russian rocket attack had killed scores of his fighters, vowing to take “revenge” and “stop the evil brought by the military leadership of the country”.

Exclusive: Head of ground forces says ‘everything is still ahead’ in counteroffensive against Russia

• Inside a secret military base with top Ukraine general
• Russia-Ukraine war – latest news updates

The commander of Ukraine’s ground forces has confirmed for the first time that the main force of his offensive reserve is yet to be committed into battle with Russia, saying: “Everything is still ahead.”

In an exclusive interview from a military base in east Ukraine, Col Gen Oleksandr Syrskyi spoke of the stresses and difficulties of the fight, with Moscow launching its own offensive efforts in recent days.

Vladimir Saldo, the Moscow-installed governor of the southern Ukrainian region of Kherson, says Chongar bridge would be closed for around 20 days. This live blog is now closed

• Ukraine commander says main offensive reserve yet to be sent into battle

Ukraine’s armed forces have stopped a Russian offensive in the east of the country towards the cities of Kupiansk and Lyman, a senior defence official has claimed.

The deputy defence minister Hanna Maliar told Ukrainian television: “We had very fierce battles in the Kupiansk and Lyman directions, but our soldiers stopped the enemy there.”

Russia killed 136 children in Ukraine last year, says UN report; Kyiv accuses Moscow’s forces of hiding bodies in aftermath of Kakhovka dam breach

• See all our Russia-Ukraine war coverage

The United Nations secretary general, António Guterres, has called out Russia for killing 136 children in Ukraine in 2022 and added its armed forces to a global list of offenders, according to a report to the UN security council. The UN also verified that Russian armed forces and affiliated groups injured 518 children and carried out 480 attacks on schools and hospitals. The forces used 91 children as human shields, according to the report. Guterres was “particularly shocked” by the high number of child casualties, he said in the report, while also saying he was disturbed by the high number of offences against children by Ukrainian forces.

Russia has formed special groups to collect and hide bodies of people killed in the aftermath of Kakhovka dam breach in southern Ukraine, Volodymyr Zelenskiy said. The Ukrainian president said in a video address on Thursday that the situation in Russian-occupied parts of the region was “catastrophic to put it mildly”.

Ukraine’s prime minister has said its counteroffensive will take time but he is optimistic about its success. Denys Shmyhal’s comments, on the sidelines of a Ukraine reconstruction conference in London on Thursday, came after Zelenskiy said the counteroffensive might be going “slower than desired” but he would not needlessly risk soldiers’ lives to meet international expectations. Moscow had suggested there appeared to have been a break in the counteroffensive’s intensity.

Foreign donors pledged €60bn of new financial support for Ukraine, the UK said, as the international conference in London aimed at funding the country’s reconstruction closed. The commitments from governments and international organisations targeted supporting Ukraine in the short- and medium-term, the British foreign minister, James Cleverly, said on Thursday.

Russia fired cruise and ballistic missiles and strike drones at targets in Ukraine early on Thursday, causing damage in the cities of Odesa and Kryvyi Rih, Ukrainian officials said.

Russian-backed officials in southern Ukraine have accused Kyiv of using British-supplied long-range missiles to strike a bridge connecting Kherson province with the Crimean peninsula. A series of photos and videos circulating on Telegram on Thursday showed a large crater on the bridge, and debris littering the roads. There were no casualties reported.

Ukraine and Moldova have made good progress on their journey to becoming members of the EU, a European commissioner has said. The EC reportedly made clear that Ukraine had a way to go to complete the seven steps the EU outlined last year when it granted Kyiv the status of a candidate for membership.

Russia is 99.9% certain to quit a UN-brokered deal on the safe wartime passage of Black Sea grain in July as it no longer needs Ukrainian ports to export ammonia, a senior Ukrainian diplomat has said.

Volodymyr Zelenskiy reportedly said Ukrainian spies believed Russia was plotting an incident to release radiation from the Russian-occupied Zaporizhzhia plant in southern Ukraine, Europe’s largest nuclear plant, an allegation denied by the Kremlin.