A Russian missile attack has killed 10 people in the city of Chernihiv in northern Ukraine, according to Ukraine's president.
Volodymyr Zelensky said another 20 people were wounded in the attack, which hit an eight-storey building in a densely populated area.
Three missiles had struck close to the centre of the city, officials said.
The attack came hours after reports of a Ukrainian attack on a Russian military airfield in occupied Crimea.
Details have yet to be confirmed, although local social media channels shared video of an apparent fire on the airfield at Dzhankoy in northern Crimea.
In Chernihiv, acting mayor Oleksandr Lomako said one building had suffered a direct hit from one of the Russian missiles and several floors had been damaged.
Video from the scene showed people getting off a trolley bus and diving for cover in the city. Officials appealed for the public to come forward to give blood.
President Zelensky said the Russian strike would not have happened "if Ukraine had received sufficient air defence equipment", and he repeated an appeal to Western allies to provide support.
Chernihiv is only 100km (60 miles) from the Russian border and has seen a number of deadly attacks since the full-scale Russian invasion in 2022. It was occupied for several weeks at the start of the war while Russia tried to capture Kyiv to the south.
In a US TV interview on Monday, the Ukrainian leader also blamed Ukraine's declining air defences for Russia's ability to destroy a key thermal power plant supplying Kyiv and other regions last week.
Mr Zelensky said 11 missiles were fired at the Trypillya plant and Ukrainian forces were only able to bring down seven of them. "Four destroyed Trypillya. Why? Because we had zero missiles. We ran out of all missiles," he told PBS.
Kyiv has been waiting for months for a $60bn (£48bn) US aid package to get through Congress, but it has been held up by Republican objections.
Mr Zelensky said the world had shown unity in assisting non-Nato country Israel when it came under Iranian missile attack, and he has called for the same political will to be shown to Ukraine.