Ukraine today rejected Russian calls to surrender the port city of Mariupol, where residents are besieged with little food, water and power in a humanitarian crisis that is increasing pressure on European leaders to toughen sanctions on Moscow.

Ukrainian authorities yesterday said that Russia had bombed a school sheltering 400 people in the besieged port of Mariupol, as Moscow claimed that it had again fired hypersonic missiles in Ukraine, the second time it had used the next-generation weapon on its neighbour.

Russia says for a second day in a row it has fired its newest hypersonic missiles in Ukraine, destroying a fuel storage site in Mykolaiv region. Hypersonic missiles travel faster than the speed of sound and can manoeuvre mid-flight, making them hard to track and intercept.

The United States has informally raised with Turkey the unlikely possibility of sending its Russian-made S-400 missile defense systems to Ukraine to help it fight invading Russian forces, according to three sources familiar with the matter.

Turkey on Sunday said Russia and Ukraine made progress on their negotiations to halt the invasion and the two warring sides were close to an agreement.

Ten million people - more than a quarter of the population - have now fled their homes in Ukraine due to Russia's "devastating" war, the United Nations refugees chief said Sunday.

Ukrainian authorities said Sunday that Russia’s military bombed an art school sheltering some 400 people in the embattled port city of Mariupol, where Ukraine’s president said an unrelenting Russian siege would be remembered for centuries to come.

Russia said Sunday it has again fired its newest Kinzhal hypersonic missiles in Ukraine, destroying a fuel storage site in the country's south.

An ordinary person's trip to the Middle East for work, then returning home and going back again in the Middle East. Crossing two countries with the help of an intermediary, reaching Ukraine. Invasion of Ukraine, 22 days of living in continuous fear of death, and finally escaping Ukraine to reach France.

The United States has informally raised with Turkey the unlikely possibility of sending its Russian-made S-400 missile defense systems to Ukraine to help it fight invading Russian forces, according to three sources familiar with the matter.

The UN human rights office (OHCHR) said on Saturday that at least 847 civilians had been killed and 1,399 wounded in Ukraine as of March 18.

Ukraine’s leader Volodymyr Zelensky yesterday made a fresh appeal for talks with Moscow, while Russia admitted using advanced hypersonic missiles for the first time in the conflict.

The Ukrainian authorities yesterday released two remaining Bangladeshis from a detention centre.

President Volodymyr Zelensky called on Saturday for comprehensive peace talks with Moscow to stop its invasion of Ukraine, saying it would otherwise take Russia "several generations" to recover from its losses in the war.

The Ukrainian prosecutor general's office said on Saturday that 112 children have been killed so far in the war in Ukraine.

Russia's defence ministry said on Saturday it had destroyed a large underground depot for missiles and aircraft ammunition in Ukraine's Ivano-Frankivsk region using hypersonic missiles, the Interfax news agency reported.

A former Russian deputy prime minister who spoke out against the Kremlin's actions in Ukraine has quit as chair of a prestigious foundation after a lawmaker accused him of a "national betrayal" and demanded his dismissal.

Massive price spikes for food and energy sparked by Russia's invasion of Ukraine will push over 40 million people into extreme poverty, the Center for Global Development (CGDEV) said on Friday, warning against export curbs and sanctions on Russian food production.

US President Joe Biden warned Chinese leader Xi Jinping on Friday of 'consequences' if Beijing gave material support to Russia's invasion of Ukraine, the White House said, while both sides stressed the need for a diplomatic solution to the crisis.

Ukrainian President Volodymyr Zelenskyy says Russian forces are blockading Ukraine’s largest cities to create a “humanitarian catastrophe” with the aim of persuading Ukrainians to cooperate with them.