Russia launched a series of missile strikes on cities in Ukraine during rush hour on Monday, killing several civilians.
A number of locations were targeted in the latest Russian offensive, including the Ukrainian capital of Kyiv, which hadn't been bombed for months.
It was reported that at least eight people were killed in Kyiv and 24 injured in the strikes.
They were apparently launched in retaliation for a Ukraine attack on the Kerch Bridge, the crossing between Russia and annexed Crimea.
Watch: Journalist forced to take cover as missile strikes hit Kyiv
Russian president Vladimir Putin had called the bridge attack a "terrorist act" at the weekend. Hours later, his country launched missile attacks across Ukraine.
Here are some of the key locations in the conflict:
Ukraine's capital was targeted by Russian strikes on Monday for the first time in months.
The attack on Kyiv resulted in explosions in the city’s Shevchenko district, a central area that includes the historic old town as well as several government offices.
Ukraine’s defence ministry said 75 missiles were launched by Russia, of which 41 were shot down.
Lesia Vasylenko, a member of Ukraine’s parliament, posted a photo on Twitter showing that at least one explosion occurred near the main building of the Kyiv National University in central Kyiv.
“What is Russia trying to hit?” she asked. “The national university? The park? Or the playground?”
An air raid alert in the city ended at lunchtime after almost six hours.
On Sunday, Ukraine said it had recaptured 450 square miles of land from Russian forces in the Kherson Oblast region (marked on the map above).
The battle to win back the land in the south of the country on the bank of the Dnipro River has been a long one compared to its recent successes in the north-east.
Southern military command spokesperson Natalia Humeniuk said Ukraine is making progress on the Kherson front, but that more progress is needed to secure newly recaptured territories.
"Work is continuing on consolidation of territory, clearing it and conducting stabilising operations, as the settlements we enter contain many surprises left by the (Russian) occupiers," she said.
"As of today, from the beginning of the counter-offensive, over 1,170 square kilometres have been liberated in the Kherson direction."
The flat agricultural Kherson region was captured by Russia in the early days of its invasion.
Russia is ploughing its military resources into the central Donbas region of Ukraine, particularly near the town of Bakhmut.
Russian troops are edging closer to the strategically important town, having advanced more than one mile over the past week, according to the UK's Ministry of Defence.
The MoD said: "Russia continues to give high priority to its own offensive operations in the central Donbas sector, especially near the town of Bakhmut."
On Saturday, Ukraine's president Volodymyr Zelensky said his country's troops were involved in very tough fighting near Bakhmut.
On Sunday, at least 13 people were killed following Russian shelling in the city of Zaporizhzhia, Ukrainian officials said. Another 87 people were reportedly injured.
It was the second strike on the city in three days.
Russia launched at least 12 missiles, partially destroying a nine-storey apartment block and levelling five other residential buildings, according to Ukraine.
Zelensky called the strike "absolute evil".
The region is one of four, along with Luhansk, Donetsk, and Kherson, to be annexed by Russia following sham referendums.
The city is about 80 miles from the Russian-held Zaporizhzhia nuclear power plant, the largest in Europe.
Watch: Ukraine bridge attack a 'terrorist act', says Vladimir Putin