The mayor of the Ukrainian capital, Kiev, says about 2 million people have fled the city - about half of the capital's population. Vitaly Klitsko said every street and building in the city has now been turned into a fortress.
Russian forces have now moved closer to the city, and fighting is raging between Ukrainian and Russian troops for control of a highway. The United Nations says the number of people fleeing Ukraine to neighboring countries has now exceeded 2.3 million.
Ukrainian Foreign Minister Dmitry Kuleba says they have agreed to work on humanitarian issues at a meeting in Turkey. But his country "will not surrender."
Russian Foreign Minister Sergei Lavrov says his country wants "serious talks" to resolve the Ukraine crisis.
A siren was sounded in the Ukrainian capital, Kiev, shortly after 6 a.m. warning of an air strike. U.S. officials estimate that between 5,000 and 6,000 Russian troops may have been killed in Ukraine so far. Ukrainian President Volodymyr Zelensky has strongly condemned the bombing of a children's hospital in Mariupol and called it a war crime.
The number of people fleeing Ukraine has exceeded 2.3 million, according to the United Nations. Roman Abramo, owner of English football club Chelsea, has been banned by the UK government.