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The UK ministry of defence has published its daily intelligence update on the war, reporting that “Ukraine continues to make progress in offensive operations along both the north-eastern and southern fronts. In the north-east, in Kharkiv Oblast, Ukraine has now consolidated a substantial area of territory east of the Oskil River.”

The other developments included in the report were:

Ukrainian formations have advanced up to 20km beyond the river into Russia’s defensive zone towards the supply node of the town of Svatove.

It is highly likely that Ukraine can now strike the key Svatove-Kremina road with most of its artillery systems, further straining Russia’s ability to resupply its units in the east.

Politically, Russian leaders will highly likely be concerned that leading Ukrainian units are now approaching the borders of Luhansk Oblast, which Russia claimed to have formally annexed last Friday.

People in Ukrainian city try to pick up pieces amid remains of Russia’s chaotic and bloody withdrawal

• Russia-Ukraine war – live updates

In the shattered streets of Lyman, a Ukrainian city that has lived through the Russian invasion, months of occupation and last week’s brutal battle to liberate it, evidence of the chaotic and bloody Russian withdrawal and defeat is everywhere.

Emerging from the dugout of a former Russian checkpoint on the outskirts of the Donbas city, a Ukrainian soldier appears clasping a Russian copy of Tolstoy’s War and Peace, which he places next to a discarded water bottle cut in half and filled with rifle ammunition. He points inside to an Orthodox icon left pinned to a wall.

Western officials say Ukraine is dictating the operational tempo on the battlefield

• Russia-Ukraine war – live updates

Ukraine has continued to liberate territory in the east and the south of the country, Volodymyr Zelenskiy has said, as Russian defence ministry maps appeared to show rapid withdrawals of its invasion forces.

The ministry’s daily video briefing made no mention of any pullbacks, but on maps used to show the location of purported Russian strikes, the shaded area designating Russian military control was smaller than the day before.

Russian forces retreat from stronghold of Lyman hours after Putin declares it Russia’s ‘for ever’; Germany minister visits Ukraine; Nord Stream pipeline leak halted

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It’s 12pm in Ukraine, here’s the latest:

Ukraine has encircled Russia’s forces around a bastion that is critical for Moscow at the eastern town of Lyman, in an operation that is still under way. Russia’s forces at Lyman totalled about 5,000 to 5,500 soldiers, but the number of encircled troops may have fallen because of casualties and some soldiers trying to break out of the encirclement, according to a spokesperson for Ukraine’s eastern forces.

The Ministry of Defence said Russia’s expansion strategy has resulted in “killing civilians it now claims are its own citizens”.The MoD said Russia is expending “strategically valuable military assets” in attempts to gain tactical advantage.

Ukraine’s president thanked his US counterpart, Joe Biden, on Saturday for signing an additional $12.35 bn (£11bn) in support for Ukraine. Volodymyr Zelenskiy said “This help is more important today than ever.”

The Ukrainian director-general of the Russian-held Zaporizhzhia nuclear power plant has been detained by a Russian patrol, according to Energoatom. The company said his detention on Friday “jeopardises the safety of operation of Ukraine and Europe’s largest nuclear power plant.”

Turkey which has been at the centre of mediation between the west and Russia, rejected Russia’s annexation of Ukraine, calling the decision a “grave violation” of international law.

The World Bank said it will provide an additional US$530m in support to Ukraine, bringing the total aid by the bank to $13bn. The aid is supported by the UK ($500m) and Denmark ($30m).

Lyman is important because it is the next step towards the liberation of the Ukrainian Donbas. It is an opportunity to go further to Kreminna and Sievierodonetsk, and it is psychologically very important.

The occupiers trapped in Liman asked the Russian command to allow them to leave the city, but were refused.