Washington said on Wednesday (8 August) it would impose fresh sanctions on Russia by the end of August after it determined that Moscow had used a nerve agent against a former Russian agent and his daughter in Britain.
Britain's media regulator opened seven investigations into Russian news channel RT, saying it had found an increase in programmes which may have breached impartiality rules since a nerve agent attack on a former Russian spy last month.
Russia unleashed a blistering war of words against Britain at the UN Security Council yesterday (5 April), deflecting accusations of poisoning a former double agent in England with denials, "Alice in Wonderland" and Russian literature.
Russia lost a bid yesterday (4 April) at the global chemical weapons watchdog to launch a joint probe with Britain into the spy poisoning scandal, and sought to press its case at the highest level, calling for urgent UN Security Council talks.
Russia on Saturday (31 March) demanded that Britain further reduce its diplomatic staff in Moscow, the latest move in an escalating tit-for-tat dispute following the poisoning of a former Russian spy on British soil.
Germany wants to keep up a dialogue with Moscow despite joining Western expulsions of Russian diplomats and must avoid a new Cold War, the German government's coordinator for Russia said in a newspaper interview.