(updates throughout) (removes extra keyword)
Russian forces are trying to press their offensive deeper into eastern Ukraine after taking control of a key stronghold.
The Ukrainian military confirmed its forces had withdrawn from the city of Lysychansk, the last bulwark of Ukrainian resistance in the Luhansk province, one of the two regions that make up the country's eastern industrial heartland of Donbas.
The Russians also control about half of Donetsk, the second province of Donbas.
Luhansk governor Serhii Haidai said Ukrainian forces retreated from Lysychansk to avoid being surrounded.
"There was a risk of Lysychansk encirclement," Mr Haidai told the Associated Press, adding that Ukrainian troops could have held on for a few more weeks but would have potentially paid too high a price.
"We managed to do a centralised withdrawal and evacuate all injured," Mr Haidai said. "We took back all the equipment, so from this point withdrawal was organised well."
The General Staff of the Ukrainian military said Russian forces are focusing their efforts on pushing towards the line of Siversk, Fedorivka and Bakhmut in the Donetsk region.
The Russian army has also intensified the shelling of key Ukrainian strongholds of Sloviansk and Kramatorsk deeper in the Donetsk region.
On Sunday, six people, including a nine-year-old girl, were killed in the Russian shelling of Sloviansk and another 19 people were wounded, according to local authorities.
Kramatorsk also came under fire on Sunday.
An intelligence briefing on Monday from the British MoD supported the Ukrainian military's assessment, noting that Russian forces will "now almost certainly" switch to capturing Donetsk.
The briefing said the conflict in Donbas has been "grinding and attritional", and is unlikely to change in the coming weeks.
While the Russian army has a massive advantage in firepower, military analysts say that it does not have any significant superiority in the number of troops.
That means Moscow lacks resources for quick land gains and can only advance slowly, relying on heavy artillery and rocket barrages to soften Ukrainian defences.
Russian President Vladimir Putin has made capturing the entire Donbas a key goal in his war in Ukraine, now in its fifth month.
Moscow-backed separatists in Donbas have battled Ukrainian forces since 2014 when they declared independence from Kyiv after the Russian annexation of Ukraine's Crimea.
Russia formally recognised the self-proclaimed republics days before its February 24 invasion of Ukraine.
Mr Putin's defence minister reported to him on Sunday that the Russian army and its separatist allies now hold all of the Luhansk region after taking "full control" of Lysychansk.
In his nightly video address, Ukrainian President Volodymyr Zelensky acknowledged the withdrawal, but vowed that Ukrainian forces will fight their way back.
"If the command of our army withdraws people from certain points of the front where the enemy has the greatest fire superiority, in particular this applies to Lysychansk, it means only one thing: we will return thanks to our tactics, thanks to the increase in the supply of modern weapons," Mr Zelensky said.
Since failing to take Kyiv and other areas in Ukraine's north-east early in the war, Russia has focused on Donbas, unleashing fierce shelling and engaging in house-to-house combat that devastated cities in the region.
Russia's invasion has also devastated Ukraine's agricultural sector, disrupting supply chains of seed and fertiliser needed by Ukrainian farmers and blocking the export of grain, a key source of revenue for the country.
In its Monday intelligence report, the MoD pointed to the Russian blockade of the key Ukrainian port of Odesa, which has severely restricted grain exports.
It predicted that Ukraine's agricultural exports would reach only 35% of the 2021 total this year as a result.
As Moscow pushed its offensive across Ukraine's east, areas in western Russia came under attack on Sunday in a revival of sporadic apparent Ukrainian strikes across the border.
The governor of the Belgorod region in western Russia said fragments of an intercepted Ukrainian missile killed four people on Sunday.
In the Russian city of Kursk, two Ukrainian drones were shot down, according to the Russian Defence Ministry.
Why are you making commenting on The Herald only available to subscribers?
It should have been a safe space for informed debate, somewhere for readers to discuss issues around the biggest stories of the day, but all too often the below the line comments on most websites have become bogged down by off-topic discussions and abuse.
heraldscotland.com is tackling this problem by allowing only subscribers to comment.
We are doing this to improve the experience for our loyal readers and we believe it will reduce the ability of trolls and troublemakers, who occasionally find their way onto our site, to abuse our journalists and readers. We also hope it will help the comments section fulfil its promise as a part of Scotland's conversation with itself.
We are lucky at The Herald. We are read by an informed, educated readership who can add their knowledge and insights to our stories.
That is invaluable.
We are making the subscriber-only change to support our valued readers, who tell us they don't want the site cluttered up with irrelevant comments, untruths and abuse.
In the past, the journalist’s job was to collect and distribute information to the audience. Technology means that readers can shape a discussion. We look forward to hearing from you on heraldscotland.com
Comments & Moderation
Readers’ comments: You are personally liable for the content of any comments you upload to this website, so please act responsibly. We do not pre-moderate or monitor readers’ comments appearing on our websites, but we do post-moderate in response to complaints we receive or otherwise when a potential problem comes to our attention. You can make a complaint by using the ‘report this post’ link . We may then apply our discretion under the user terms to amend or delete comments.
Post moderation is undertaken full-time 9am-6pm on weekdays, and on a part-time basis outwith those hours.
Read the rules here