Joe Biden has authorised Ukraine’s use of long-range missiles to strike hundreds of miles inside Russia for the first time, according to media reports.The decision is a major US policy shift and comes despite Russia’s warning that it would regard permission for Kyiv to use American-made missiles “as a major escalation”.

MANAUS, Brazil -- President Joe Biden has for the first time authorized the use of U.S.-supplied long-range missiles by Ukraine to strike inside Russia, according to one U.S. official and three people familiar with the matter.