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Dozens of Russian missiles have struck targets across Ukraine, with the capital Kyiv enduring the heaviest barrage in months.
A Kyiv apartment block was destroyed, killing one and wounding four others including a seven-year-old girl.
Ukraine says at least 14 missiles were fired at the Kyiv region on Sunday, but the strikes extended far beyond the capital.
Other areas hit included the central city of Cherkasy and Kharkiv region.
The strikes came as leaders of the G7 group of the world's richest nations began a three-day summit in Germany, with the Ukraine conflict top of the agenda. They are expected to promise further military support for Kyiv and impose more sanctions on Moscow.
In Kyiv, a large blast crater was gouged in a school playground, near the apartment block whose top floors were ripped apart. The injured girl's mother - a Russian citizen - was also pulled from the rubble and taken to hospital, officials said.
Ukraine's military says some missiles were launched from Tupolev bombers over the Caspian Sea, some 1,450km (900 miles) away. And on Saturday, it said, Russian missiles were fired from Tupolevs flying over neighbouring Belarus.
The Russian defence ministry said high-precision weapons struck Ukrainian army training centres on Sunday in the regions of Chernihiv, north of Kyiv, and Zhytomyr and Lviv west of the capital.
The strike on Starychi district in Lviv was just 30km (19 miles) from the border with Nato member Poland.
Kyiv Mayor Vitali Klitschko said the attacks were an attempt to intimidate Ukraine ahead of this week's G7 summit.
The last major Russian missile strike on Kyiv was on 5 June when a railway repair facility was hit.
Russia has become internationally isolated through far-reaching sanctions since its 24 February invasion of Ukraine.
After big early setbacks, Russia has made some advances in the east despite fierce Ukrainian resistance, and on Saturday finally captured Severodonetsk, a city now in ruins.
Military analysts say it is now a war of attrition in the industrial eastern Donbas region, though Kyiv's forces are outgunned by Russian artillery and missiles. Kyiv has urged the West again to speed up deliveries of heavy weapons.
UK Prime Minister Boris Johnson met French President Emmanuel Macron at the G7 in Bavaria. A spokesperson for Mr Johnson said "they agreed this is a critical moment for the course of the conflict, and there is an opportunity to turn the tide in the war".
They agreed to sustain military support for Ukraine, and Mr Johnson "stressed any attempt to settle the conflict now will only cause enduring instability" by giving "licence" to Russian President Vladimir Putin. He said leaders must be honest about the war's rising costs, but the price of Russia succeeding was "far higher".
German Chancellor Olaf Scholz, hosting the G7, said unity over Ukraine was the group's clear message to Mr Putin.
"We are united by our world view and by our belief in democracy and rule of law," he said.