Russia said British authorities had failed to produce any evidence of Russian involvement in the poisoning and showed no interest in conducting a thorough investigation.
He added: "I don't think anyone can ever say that Mr Putin isn't in control of his state". He accused Britain of using the poisoning to create "anti-Russia hysteria".
They said they would not formally demand their extradition, as Russian Federation does not extradite its citizens, but have obtained a European Arrest Warrant for the pair. He urged all countries to support Russia's appeal to Britain to begin consultations in the framework of the Chemical Weapons Convention.
"It specializes in this kind of high-risk, short-term operation", said Andrew Foxall, head of the Russian Federation program at the Henry Jackson Society, an analyst group. The UK Foreign Office has refused to provide details on the issue of introducing new sanctions against Russian Federation in connection with the Salisbury poisoning incident.
Members of the emergency services help each other to remove their protective suits at the site of the grave of Luidmila Skripal, wife of former Russian inteligence officer Sergei Skripal, at London Road Cemetery in Salisbury, Britain, March 10, 2018.
British police said Wednesday the case is now part of the Skripal investigation.
Nebenzia says that for Russian Federation, "the only issue is what kind of ploy London will invent in order to avoid a truly serious rather than a politically motivated investigation of the case.".
She told reporters that Britain will be discussing next steps with its allies, stressing that the issue goes beyond Salisbury.
"We are also seeking to circulate Interpol Red Notices", said Metropolitan Police Assistant Commissioner Neil Basu, the UK's National Lead for Counter Terrorism Policing.
Britain has said it is not going to seek the men's extradition because Russian law does not allow for the extradition of its nationals to be tried overseas.
"We, the leaders of France, Germany, the United States, Canada and the United Kingdom, reiterate our outrage at the use of a chemical nerve agent, known as Novichok, in Salisbury on March 4".
"We urge Russian Federation to provide full disclosure of its Novichok programme to the OPCW. It was nearly certainly also approved outside the GRU at a senior level of the Russian state", she said in the House of Commons. The murder attempt was approved "at a senior level of the Russian state", British Prime Minister Theresa May said Wednesday.
Britain's United Nations ambassador, Karen Price, told the session that after "painstaking and methodical work" by the country's independent police agencies and prosecutors, the government has concluded "there is enough evidence to bring charges against two Russian nationals" for conspiracy to commit murder, attempted murder, the use of and possession of the chemical nerve agent Novichok, and other crimes.
"For us any sort of accusation regarding the Russian leadership is unacceptable", Kremlin spokesman Dmitry Peskov told journalists.
The U.K. does not expect Russia to hand over the men, Alexander Petrov and Ruslan Boshirov, who U.K. officials say work for Russian military intelligence, according to the Associated Press.