The Ukrainian leader has also renewed his plea for more weapons ahead of an expected surge in fighting in the country’s east.
The war in Ukraine is now well into its sixth week, and taking on a new dimension with growing evidence of human rights atrocities by Russian troops as they retreated from the Kyiv region and other parts of the north.
Despite Moscow's blanket denials, horrific discoveries of civilian murders and other barbaric acts are coming to light.
As Vladimir Putin's forces concentrate their offensive on eastern Ukraine, NATO and the EU have promised Kyiv more weapons, and Western nations are tightening sanctions against Moscow.
Follow Sunday's events as they unfolded in our blog below, or watch TV coverage in the video player above.