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Prime Minister Theresa May has mentioned the G7 will take additional motion in opposition to Russia if it continues to intrude with different international locations.
Leaders have been sending "a clear message that such malign activity will never be tolerated" after the poisoning of the Russia ex-spy Sergei Skripal, she mentioned.
Mrs May additionally mentioned the EU would impose countermeasures after the United States imposed tariffs on imported steel merchandise.
But the prime minister warned in opposition to a "tit-for-tat" response.
Before the assembly, US President Donald Trump had known as for the G7 to re-admit Russia and likewise sparked fears of a commerce conflict by elevating tariffs on EU metal and aluminium imports.
Mrs May mentioned Russia wanted to "change its approach" earlier than being invited again into the group.
It was expelled in 2014 in response to its annexation of Crimea.
Mrs May welcomed the joint communiqué by world leaders, which criticised Russia's makes an attempt to "undermine democratic systems"
It additionally endorsed the UK's evaluation that Russia was liable for the nerve agent assault in opposition to Me Skripal and his daughter Yulia in Salisbury.
While she warned in opposition to escalating commerce tensions, Mrs May expressed "deep disappointment at the unjustified decision by the United States to apply tariffs to EU steel and aluminium imports".
"There have been some difficult conversations and strong debates but by working together we have agreed an outline to shape a better future," Mrs May mentioned.