A man and a woman are taken ill after a medical incident in Salisbury, United Kingdom. Police seal off a restaurant as a precautionary measure. According to "The Guardian", tensions are high due to recent Novichok poisonings. According to the BBC, "there's no suggestion that this is connected". According to Sky News, at least one of the individuals who fell ill is a Russian.
Police determine two British nationals found unconscious at a property in Amesbury, Wiltshire, on Saturday were poisoned using Novichok nerve agent of the same kind used in the poisoning of Sergei and Yulia Skripal in Salisbury, seven miles from Amesbury, almost four months ago.
Russia requests for the United Kingdom to release "every possible element of evidence" proving Russian involvement and requests the Executive Council of the Organisation for the Prohibition of Chemical Weapons to call a special session tomorrow.
In response to the UK's decision to expel 23 Russian diplomats following the poisoning of Sergei and Yulia Skripal, the Russian Federation expels 23 British diplomats, closes the British Council in Russia and closes the Consulate-General of the United Kingdom in Saint Petersburg.
The death of Russian businessman Nikolai Glushkov, who lived in exile in the United Kingdom, is confirmed by a coroner's examination to be a murder. The killing happened eight days after the poisoning of Sergei and Yulia Skripal.
The United Kingdom expels 23 Russian diplomats and cuts off all top-level ties with Russia as punishment for a reported attack with the Novichok military-grade nerve agent, an attack which Prime Minister Theresa May described as an "unlawful use of force by the Russian state against the United Kingdom".
Former Secret Intelligence Service (MI6) spy Sergei Skripal and his daughter are taken to a hospital in critical condition after being exposed to an unknown substance in Wiltshire, United Kingdom. Skripal was granted refugee status in the UK following a "spy swap" deal between the UK and Russia in 2010.