The Russian Embassy has sent out a series of scathing tweets which directly threaten the 'crooked' UK with retaliation.
The embassy said its country will take action if the British Government continues to suggest it was involved in the poisoning of former spy Sergei Skripal .
In seven tweets the embassy said Russia will not co-operate with the UK inquiry into how Mr Skripal and his daughter, Yulia, were poisoned in Salisbury, until it has been given a sample of the substance used.
It added: "Any threat to take 'punitive' measures against Russia will meet with a response. The British side should be aware of that."
In another tweet the embassy stated: "Britain must comply with the Chemical Weapons Convention which stipulates joint investigation into the incident, for which Moscow is ready."
Another said: "Without that, there can be no sense in any statements from London. The incident appears to be yet another crooked attempt by the UK authorities to discredit Russia."
One tweet, accompanied by a picture of what appeared to be chemical poisons, read: "Moscow will not respond to London’s ultimatum until it receives samples of the chemical substance to which the UK investigators are referring."Read More
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Double agent Mr Skripal, 66, and Yulia, 33, were found slumped on a bench in Salisbury, Wiltshire after eating at the city centre Zizzi.
The pair remain in a critically ill condition and police confirmed that a total of 38 people have required hospital treatment since the attack 10 days ago.
Russia was given a midnight deadline by Theresa May to explain why a Russian-made nerve agent was used on March 4.
But the tweets came as another Russian exile was found dead on British soil.
Counter-terror police launched a probe into the death of anti-Putin Russian exile Nikolai Glushkov whose body was discovered in his south west London home on Monday night.
Glushkov was reportedly close friends with the late oligarch Boris Berezovsky.Read More
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Donald Trump says he will condemn "Russia or whoever it may be" behind the Salisbury nerve agent attack - if he agrees with Theresa May's evidence.
The US President will phone the Prime Minister today, he told reporters outside the White House this morning just minutes after the White House confirmed the sacking of Secretary of State Rex Tillerson.
Last night, Mr Tillerson issued a firm statement saying the attack "clearly came from Russia" and Moscow "must face consequences."
Trump said: "Well it sounds to me, I'm speaking to Theresa May today. It sounds to me like it would be Russia based on all of the evidence they have.
"I don't know if they've come to a conclusion, but she's calling me today."