US says Iranian troops ‘directly engaged’ in Crimea supporting Russian drone strikes – as it happened

Relatively small number' of troops helping Russian forces, says John Kirby, national security council spokesperson

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Joe Biden described Liz Truss as a good partner on Russia and Ukraine," after the British prime minister announced she would step down after just 45 days in office.

Speaking to reporters at the White House before leaving for Pennsylvania, Biden added, The British are going to solve their problems."