Russia-Ukraine war: discovery of mass grave in Izium prompts call for war crimes tribunal – as it happened

Czech foreign minister says attacks by Russians on civilian population are unthinkable and abhorrent'. This blog is now closed

• Izium: after Russian retreat, horrors of Russian occupation are revealed

President Zelenskiy's senior adviser, Mykhailo Podolyak, has urged European countries to provide Ukraine with modern and effective" missile defence systems.

His tweet comes after Vladimir Putin warned that Moscow could ramp up its strikes on the country's vital infrastructure if Ukrainian forces target facilities in Russia.