After Russia failed to meet May's deadline to explain how a Russian nerve agent was used to poison three people on British soil [[a British police officer is also hospitalized after being exposed), the UK has now expelled 23 Russian diplomats from the country and called for an emergency session of the UN Security Council to discuss the matter:

https://www.nytimes.com/2018/03/14/w...-measures.html

NATO has called this incident the "first offensive use of a nerve agent” on alliance territory since NATO was founded in 1949 and that this attack was "a clear breach of international norms and agreements.”

May is expected to put forth further "economic and diplomatic" reprisals to the UK Parliament today. She has also received backing from top European allies, including France and Germany, to do more to combat Russian meddling in Western Europe.

Meanwhile, Donald Trump has finally weighed in on the matter saying "it sounds to me" like Russia was behind the chemical attack "based on all the evidence."