Zelenskiy calls Russian forces ‘butchers’ over Bucha massacre | First Thing

Ukraine president says worse atrocities may yet be uncovered as satellite images show mass grave near church in Bucha. Plus, scientists urge end to fossil fuel use

Good morning.

Ukraine's president, Volodymyr Zelenskiy, has said Russia's public image is now one of torture and execution after the retreat of Russian forces in the town of Bucha led to the discovery of the remains of hundreds of civilians.

What has Russia said about the reports coming out of Bucha? Russia's foreign ministry said footage of dead civilians in the Ukrainian town of Bucha had been ordered" by the US as part of a plot to blame Russia.

Is rape being used as a weapon of war? There is a mounting body of evidence that summary executions, rape and torture have been used against civilians in areas under Russian control since the Kremlin launched the invasion of its neighbour on 24 February.

What else is happening? Here's what we know on day 39 of the Russian invasion.

What is the US government going to do go help Ukraine? Blinken would not be drawn on the details of US military aid being sent to Ukraine, but said the aim was to make sure they have the systems they need".