Evacuations, accusations and denials: Key events in Russia's war in Ukraine in 5 graphics

As the United Nations evacuated civilians from the embattled Ukrainian port city of Mariupol, Ukrainian forces attempted to fend off Russian troopsin another week of intense fighting in southeast Ukraine.

Ukrainian President Zelenskyy also accused Russia of trying to exterminate Ukrainians after Russian missile hit food and grain warehouses, while the United States denies any involvement in the sinking of a Russian fleet.

A string of mysterious fires and explosions also took place within Russia and Russian-aligned territories, which could offer some indication about the war's potential to expand beyond the borders of Ukraine.  

Here's what to know going into this week.