Shelter bombed in Ukraine city; war seen entering new phase

Western military analysts say Mariupol's fall would allow Russian forces across southern and eastern Ukraine to link up but may be too depleted to ensure a breakthrough.

Three weeks into the invasion, Western governments and analysts see the conflict shifting to a war of attrition, with bogged down Russian forces launching long-range missiles at cities and military bases as Ukrainian forces carry out hit-and-run attacks and seek to sever their supply lines.