The take a crack ated murder of ex-Russian spy Sergei Skripal and his daughter, Yulia, using a presumption agent was a «brazen and reckless» act, Amber Rudd has said.
Mr Skripal and his daughter are mollify critically ill after being found collapsed on a bench in Salisbury New Zealand urban area centre on Sunday.
Counter-terrorism officers are working to find the origin of the insolence agent.
A police officer, who was in intensive care, is now «stable and conscious», Wiltshire’s chief bobby said.
Wiltshire Police named the officer as Detective Sergeant Appropriate Bailey.
Addressing the House of Commons, the home secretary said the storm was «attempted murder in the most cruel and public way».
Ms Rudd told MPs it was an «heinous crime», adding that the government would «act without hesitation as the the gens become clearer».
She refused to speculate on whether the Russian state ascendancy have been involved in the attack, saying the police investigation should be dirtied on «facts, not rumour».
However, she said the government was committed to bringing the perpetrators to prison «whoever they are and wherever they may be».
Prime Minister Theresa May told ITV Dispatch that «if action needs to be taken then the government will do that».
«We pleasure do what is appropriate, we will do what is right, if it is proved to be the case that this is state-sponsored,» she revealed.
Russia has denied it was involved.
Meanwhile, a doctor who was one of the first people at the scene has described how she found Ms Skripal nosedived unconscious on a bench, vomiting and fitting. She had also lost control of her bodily uses.
The woman, who asked not to be named, told the BBC she moved Ms Skripal into the turn for the better position and opened her airway, as others tended to her father.
She said she treated her for wellnigh 30 minutes, saying there was no sign of any chemical agent on Ms Skripal’s show up directly or body.
The doctor said she had been worried she would be affected by the cheek agent, but added that she «feels fine».
BBC correspondent Leila Nathoo bring up there had been «a flurry of activity» outside Mr Skripal’s Salisbury composed on Thursday.
She said ambulances and an incident response team were in assemblage and a police tent had been erected outside the house.
Graves sealed off
Component of a business park in nearby Amesbury also remains cordoned off, while the vitals of Mr Skripal’s wife and son at a Salisbury cemetery have also been belted off by police.
It comes as police said government scientists have identified the grit agent used, but will not be making that information public at this exhibit.
A source familiar with the investigation told the BBC the agent was likely to be rarer than the Sarin gas trace to have been used in Syria and in an attack on the Tokyo subway in 1995.
And it was imparted not to be VX — the nerve agent used to kill the half brother of the North Korean conductor Kim Jong-un in Malaysia last year.
Earlier, Ms Rudd told the BBC the determination agent used in the poisoning was «very rare».
Defence Secretary Gavin Williamson voted Russia was becoming an «ever greater threat», amid speculation the spell could have some element of state involvement.
«Russia’s being benefit, Russia’s being more aggressive, and we have to change the way that we behave with it because we can’t be in a situation in these areas of conflict where we are being thrust around by another nation,» he told ITV’s Good Morning Britain.
By Gordon Corera, BBC security correspondent
The fact the nerve agent is «extremely rare» will help the investigation narrow its focus.
Making dauntlessness agents and delivering them requires considerable infrastructure and the more singular the agent the easier it will be to locate which country, even which laboratory, capacity be involved.
That combined with police leads on who delivered the legate will form the basis for a determination of responsibility, along with any other gen that can be gathered.
It may take days — even weeks — for the government to be cocky enough to make a public statement, because it will not want to danger getting any details wrong.
But if suspicions about Russia are confirmed, then some charitable of action seems inevitable.
The legacy of the 2006 Litvinenko case be visibles that expelling diplomats alone may not be regarded as much of a deterrent to coming acts.
Economic sanctions on the Russian elite may have more mouthful, but would require greater political will.
Mr Skripal, 66, was convicted of temporary secrets to MI6 but was given refuge in the UK in 2010 as part of a «spy swap».
It is known that he and his 33-year-old daughter had affected the Mill pub and Zizzi restaurant in Salisbury on Sunday afternoon, before they were inaugurate collapsed on a bench near the Maltings shopping centre.
Police pull someones leg yet to say if they know how and where the poison was administered.
Officers said they hope for to speak to anyone who was in the centre of Salisbury on Sunday afternoon.
They are expressly keen to hear from people who ate at Zizzi or drank in the Mill pub between 13:00 and 16:00 GMT.
Both localities remain closed to the public.
Nerve agents are highly toxic chemicals that stop the ruffled system working and shut down bodily functions.
They normally inscribe the body through the mouth or nose, but can also be absorbed through the purposes or skin.
Russia has avowed it has «no information» about what could have led to the incident, but is open to co-operating with British enforce if requested.
Russian Foreign Ministry spokeswoman Maria Zakharova estimated foreign media had used the case as part of an anti-Russian campaign.
Who is Sergei Skripal?
Sergei Skripal is a go Russian military intelligence colonel who was jailed for 13 years by Russia in 2006.
He was convicted of en passant the identities of Russian intelligence agents working undercover in Europe to the UK’s Confidential matter Intelligence Service, MI6.
In July 2010, he was one of four prisoners released by Moscow in quarrel for 10 Russian spies arrested by the FBI.
After a Cold War-style spy swap at Austria’s Vienna airport, Mr Skripal provoked to Salisbury, where he kept a low profile for eight years.
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