Russia began an all-out invasion of Ukraine on 24 February 2022, carrying out extensive military operations marked by war crimes and other violations of international humanitarian law. Using indiscriminate weapons such as cluster munitions in populated areas, including in cities such as Kharkiv and Chernihiv, Russian forces have killed civilians and demolished residential structures, including apartment blocks. The hardest-hit city of all has been Mariupol, where relentless Russian attacks have left many areas in ruins. In Bucha and other towns northwest of Kyiv, Russian soldiers have extrajudicially executed civilians and looted civilian property. More than 14 million people have been uprooted by the conflict, with close to six million fleeing to neighbouring countries as refugees. Sexual crimes have been reported. There are reports that Ukrainian forces have operated out of residential areas, drawing Russian fire there and endangering the civilian population. There is also compelling evidence to indicate that both Russian and Ukrainian forces have mistreated prisoners of war.