Ukraine: What happened today, Wednesday, April 13

In the seven weeks since Russia invaded Ukraine, the ground advance stalled, Russia has lost potentially thousands of fighters and the war has forced millions of Ukrainians to flee.

A member of the Ukrainian territorial defense forces walks in front of a destroyed house in Bohdanivka village, northeast of Kyiv. Picture: Genya SAVILOV / AFP via Getty Images

In one of the most crucial battles of the war, Russia said more than 1,000 Ukrainian troops had surrendered in the besieged port of Mariupol, where Ukrainian forces have been holding out in pockets of the city. The claim could not be verified.

Russia invaded on February 24 with the goal, according to western officials, of taking Kyiv, toppling the government and installing a Moscow-friendly one.