Britain's claim that Moscow was behind the poisoning of a former Russian spy is facing fresh scrutiny.
It's emerged the UK government's deleted a tweet blaming Russia for producing the nerve agent used in the attack.
The attack a month ago - on Sergei Skripal and his daughter in Salisbury - has triggered a wave of tit-for-tat expulsions of diplomats around the world.
The UK Foreign Office acknowledges it removed the social media post.
Why would @foreignoffice delete this tweet from 22 March? pic.twitter.com/Nvu1BfJw9J
— Russian Embassy, UK (@RussianEmbassy) April 4, 2018
However, it says the decision to delete doesn't change the UK government's assessment that Russia was responsible for the "brazen and reckless act".
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