"The Russian side is still open for professional cooperation through the relevant departments, if Great Britain abandons the concept of a politically motivated" appointment "of the guilty," the diplomatic mission quotes TASS.
Also, the embassy said that the extradition of Russians to other states is impossible in accordance with the Constitution and "this principle will be observed in the future."
Earlier, the British police brought charges against the third Russian in the Salisbury poisoning case.
Russian Foreign Ministry spokeswoman Maria Zakharova said Moscow condemns London's attempts to shift responsibility in the Skripals case onto the Russian side.
On March 5, 2018, it became known that in the British Salisbury a man and a woman were poisoned by an "unknown substance", after which they were hospitalized in critical condition.
The victims were ex-GRU colonel Sergei Skripal and his daughter.