Moscow faced global revulsion and accusations of war crimes Monday after the Russian pullout from the outskirts of Kyiv revealed streets, buildings and yards are strewn with corpses of what appeared to be civilians, many of them evidently killed at close range.

The grisly images of battered or burned bodies left out in the open or hastily buried led to calls for tougher sanctions against the Kremlin, especially a cutoff of fuel imports from Russia. Germany and France reacted by expelling dozens of Russian diplomats, suggesting they were spies, and U.S. President Joe Biden said Russian leader Vladimir Putin should be tried for war crimes.

“This guy is brutal, and what’s happening in Bucha is outrageous,” Biden said, referring to the town northwest of the capital that was the scene of some of the horrors.

Ukrainian President Volodymyr Zelenskyy left the capital, Kyiv, for his first reported trip since the war began nearly six weeks ago to see for himself what he called the “genocide” and “war crimes” in Bucha.

In his nightly video address, Zelenskyy pledged that Ukraine would work with the European Union and the International Criminal Court to identify Russian fighters involved in any atrocities.