Ukrainian troops counter-attacking against Russian forces in the country's north-east have pushed them back from the city of Kharkiv and advanced almost as far as the border with Russia.
Key points:
- It remains unclear how many troops had reached the Russian border or where
- The governor of the Luhansk region said the situation "remains difficult" with Russian forces trying to capture the town of Sieverodonetsk
- The most intense fighting appeared to be around the eastern Russian-held city of Izium
A senior US defence official confirmed the reports on Monday and said Ukrainian troops had pushed Russian troops to within 3-4 kilometres of the border.
The developments signal a further shift in momentum in favour of Ukrainian forces nearly three months into the conflict.
Moscow, meanwhile, warned of "far-reaching consequences" should Finland and Sweden go ahead with plans to join the NATO military alliance — a change in the Nordic countries' long-standing policy of neutrality brought on by concern about Russian President Vladimir Putin's wider ambitions.
Fighting was reported near Kharkiv, Ukraine's second-largest city, on Monday (local time) in what interior ministry adviser Vadym Denisenko said was "our counter-offensive".
"It can no longer be stopped," he said.
"Thanks to this, we can go to the rear of the Russian group of forces."
Kharkiv, lying about 50km from the border with Russia, had endured weeks of heavy bombardments from Russian artillery.
The Russians' routing from there follows their failure to capture the capital Kyiv in the early stages of the war.
Ukraine's defence ministry said on Monday the 227th Battalion of the 127th Brigade of Ukraine's Territorial Defence Forces had reached the border with Russia.
Kharkiv region governor Oleh Sinegubov said the troops had restored a sign on the border.
"We thank everyone who, risking their lives, liberates Ukraine from Russian invaders," Mr Sinegubov said.
Reuters could not immediately verify Ukraine's battlefield account and it was not clear how many troops had reached the Russian border or where.
If confirmed, it would suggest a Ukrainian counter-offensive is having increasing success in pushing back Russian forces in the north-east after Western military agencies said Moscow's offensive in the east's Donbas region had stalled.
Nonetheless, the governor of the Luhansk region in Donbas, Serhiy Gaidai, said the situation "remains difficult", with Russian forces trying to capture the town of Sieverodonetsk.
He said leaders of the Luhansk People's Republic, the territory in Luhansk controlled by Russian-backed separatists, declared a general mobilisation, adding it was "either fight or get shot, there is no other choice".
In the south, fighting was raging around the city of Kherson and Russian missiles struck residential areas of Mykolayiv, the presidential office in Kyiv said. Reuters was unable to verify the reports.
NATO Secretary-General Jens Stoltenberg said on Sunday Ukraine could win the war, an outcome few military analysts predicted when Russia invaded Ukraine.
NATO expansion
In a blow for Russia, which has long opposed NATO expansion, Finland on Sunday confirmed it would apply to join the alliance.
Sweden's ruling Social Democrats also backed NATO membership, paving the way for an application and abandoning decades of military non-alignment.
The Kremlin, however, has repeatedly warned the move would have destabilising consequences for security in Europe.
Mr Putin said that Moscow “does not have a problem” with Sweden or Finland as they apply for NATO membership, but that "the expansion of military infrastructure onto this territory will of course give rise to our reaction in response.”
"What that [response] will be — we will see what threats are created for us," Mr Putin said.
"Problems are being created for no reason at all. We shall react accordingly."
NATO and the United States said they were confident both countries would be accepted into the alliance and that reservations from Turkey, which wants the Nordic countries to halt support for Kurdish militant groups present on their territory, could be overcome.
Fighting around Izium
The most intense fighting appeared to be around the eastern Russian-held city of Izium, where Russia said it had struck Ukrainian positions with missiles.
Russia continued to target civilian areas along the entire frontline in Luhansk and Donetsk, firing at 23 villages and towns, Ukraine's military task force said.
Ukraine's military also acknowledged setbacks, saying Russian forces "continue to advance" in several areas in the Donbas region.
There was also no let-up on Sunday in Russia's bombardment of the steelworks in the southern port of Mariupol, where a few hundred Ukrainian fighters are holding out weeks after the city fell into Russian hands, the Ukrainian military said.
Alexander Khodakovsky, a commander of separatist forces in Donetsk, said on his Telegram channel on Monday that 10 Ukrainian fighters emerged from a tunnel at the Azovstal steel plant holding white flags.
Ukrainian President Volodymyr Zelenskyy said "very difficult and delicate negotiations" were going on to save Ukrainians in Mariupol and Azovstal.
Ukrainian troops received a morale boost from the country's win in the Eurovision song contest at the weekend, with some saying it was a sign of battlefield victories to come.
"We have shown that we can not only fight, but we can also sing very nice," said Vitaliy, a soldier bunkered down north of Kyiv.
Reuters
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