Russia’s political and economic isolation deepened on Monday as it prepared to hold peace talks with Ukraine – as satellite images showed a more than three-mile-long Russian military convoy nearing Kyiv.

There were more Russian air attacks and fierce clashes between the two sides overnight as Russian forces continued to close in on the Ukrainian capital.

However, its forces have met an outgunned but determined resistance in Kyiv and other cities including Kharkiv, with Russian President Vladimir Putin putting Russia’s nuclear deterrent on high alert on Sunday in the face of a barrage of Western-led reprisals for his war on Ukraine.

Ukraine-Russia news live: Blasts heard in Kyiv and Kharkiv as Zelenskyy says next 24 hours ‘crucial’ for Ukraine

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Key developments:

• Blasts heard overnight in Kyiv and Kharkiv
• The curfew imposed last week in Kyiv has been lifted but police remain on high alert
• Ukraine and Russia to hold negotiations on Belarusian-Ukrainian border
• Ukrainian President Zelenskyy says next 24 hours “crucial”
• Russian bank run as rouble plunges to all-time low
• ‘Russian saboteurs’ shoot dead schoolgirl and her parents

As the conflict entered its fifth day on Monday, a Ukrainian delegation arrived on the border with Belarus to meet the Russians “without preconditions” to discuss the crisis.

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The key issue of the talks is an “immediate ceasefire and the withdrawal of troops from Ukraine”, the Ukrainian president’s office said in a statement.

The talks come as President Volodymyr Zelenskyy said the next 24 hours will be “a crucial period” for his country.

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He was speaking to Prime Minister Boris Johnson who praised the “heroic” resistance of the Ukrainian people in the face of the Russian attack and told the Ukrainian leader that Britain would do all it could to get more arms to his military.

Satellite imagery released by Maxar Technologies taken on Sunday showed a 3.25 mile (5km) long convoy of Russian ground forces including tanks about 40 miles (64 km) away heading towards Kyiv.

Ukrainian forces have so far appeared to slow the invasion by Russian Armed Forces, with the UK Ministry of Defence saying in an update “logistical failures and staunch Ukrainian resistance continue to frustrate the Russian advance” and that for the first time in the conflict Russia has been “forced to acknowledge suffering casualties”.

Heavy fighting continues around Kharkiv – Ukraine’s second largest city – and Chernihiv, but both cities remain under Ukrainian control.

The bulk of Russian ground forces remain more than 18 miles (30km) to the north of Kyiv – slowed by Ukrainian forces defending Hostomel airfield, a key Russian target, the UK MoD said.

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The Russian rouble sank nearly 30% against the US dollar early on Monday after Western nations moved to block Russian banks from the SWIFT global financial messaging system.

At one point the rouble was trading at a record low of 105.27 roubles to the dollar, down from about 84 roubles per dollar late on Friday.

Britain’s chancellor Rishi Sunak said on Monday the measures “demonstrate our determination to apply severe economic sanctions in response to Russia’s invasion of Ukraine”.

Photos showed Russians queueing to withdraw money in some cities, worried about cash shortages, despite the Russian Central Bank calling for calm.

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Meanwhile, the number of civilian deaths is growing by the day.

Ukraine’s health ministry said on Sunday that 352 civilians, including 14 children, had been killed since the beginning of Russia’s invasion of Ukraine. It also said that 1,684 people, including 116 children, had been wounded.

The first fatality to be named is a girl from Kyiv called Polina, who was in the 4th grade.

She and her parents were shot dead by a Russian sabotage and reconnaissance group who opened fire on the family car, the city’s deputy mayor Volodymyr Bondarenko said in a Facebook post.

He added that Polina’s brother is receiving treatment at Okhmatdyt children’s hospital and her sister is in intensive care at a second hospital.

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