The G8 summit will not take place in Russia this year, UK Prime Minister David Cameron has said.
Speaking in the Netherlands, Mr Cameron said it was "absolutely clear" the planned June meeting of world leaders in the Russian resort of Sochi would not happen due to events in Ukraine.
The EU and US have imposed sanctions on Russian officials after its annexation of Crimea from Ukraine.
Moscow has also been warned of further action if it does not change course.
The announcement that the Sochi meeting had been cancelled comes after Russian troops seized control of the last major military base in Crimea.
It comes as Mr Cameron, US President Barack Obama and other G7 leaders attend a nuclear co-operation summit in The Hague, to which Russian President Vladimir Putin was not invited.
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