Mr Guterres seemed happy to be in Russia despite Ukraine's anger - surely there's a reason he's come all this way.

Ukraine's Foreign Ministry blasted U.N. Secretary General Antonio Guterres on Monday for what it said was his acceptance of an invitation from Russian President Vladimir Putin to a BRICS summit, while staying away from a "peace summit" on the war in Ukraine.

The summit’s final document said little about the Ukraine war, but several participants were still searching for a way to end it diplomatically.