Ukraine on Friday observed a day of mourning following one of the deadliest Russian attacks on the capital Kyiv since the 2022 full-scale invasion. At least 31 people, including five children, were killed in Thursday's bombardment. US President Donald Trump, who gave Russia a "10 or 12" deadline this week to end the hostilities, said the attacks were “disgusting”. Gulliver Cragg, our correspondant in Ukraine, has more.