“As this Russian tide is receding from parts of Ukraine, the world is seeing the death and destruction left in its wake,” he told reporters as he flew to Brussels.

“What we’ve seen in Bucha is not the random act of a rogue unit. It’s a deliberate campaign to kill, to torture, to rape, to commit atrocities. The reports are more than credible. The evidence is there for the world to see.

“This reinforces our determination, and the determination in countries around the world, to make sure that one way or another, one day or another, there is accountability for those who committed these acts, for those who ordered them,” he added.

Blinken said the US was working with others to gather evidence to assist the Ukrainian prosecutor general and the UN Human Rights Council in investigations.

“Information that we’d seen going into the aggression suggested that this would be part of the Russian campaign,” Blinken said. “Horrifically, tragically what we’re seeing in Bucha, and in other places, supports that.”

“But in all of these instances, there’s a very important effort to put the evidence together.”

“Meanwhile, what’s vital is to sustain and build on the support for Ukraine, to sustain and build on the pressure against Russia to bring this war to an end,” Blinken said.

Ukrainian President Volodymyr Zelensky was to address the UN Security Council today, the day after he made an emotional trip to Bucha, where dozens of bodies were discovered after the withdrawal of Russian troops.