A total of 38 people have required hospital treatment since a nerve agent attack on the city of Salisbury, 10 days ago, according to the Met Police.
Assistant Commissioner Neil Basu spoke outside New Scotland Yard and said in a statement that 35 people, besides the Skripals and Detective Sergeant Nick Bailey from Wiltshire Police, had been treated in hospital as a result of contact with the substance.
Of those people, 34 had been assessed and discharged. However, the condition of one person is still being monitored.
Police said the pair remain critically ill in hospital. Detective Sgt Nick Bailey, is still in a serious but stable condition.
Today the Metropolitan Police gave the public an update of the investigation. In a statement outside Scotland Yard they revealed one of the main focuses was Sergei Skripal's car.
Police want to speak to anyone who may have seen a red BMW reg HD09 WAO - in the Salisbury area between 1pm and 1.45pm on Sunday 4th March.
According to the Prime Minister Theresa May, Russia has until midnight to respond to claims it was behind the nerve agent attack in Salisbury 10 days ago. If they miss that deadline - the UK could impose a series of sanctions.
The prime minister said the substance used was a "military grade" nerve agent produced by Russia, called Novichok.
But Russia says the State is not guilty and it will only cooperate with Britain's investigation if it receives samples of the nerve agent used.
Foreign Secretary, Boris Johnson spoke earlier, claiming the substance found on the streets of Salisbury is the first time such a nerve agent has been used in Europe since World War 2.
He said should Russia be behind the "brazen attempt to murder innocent people on UK soil", the Government is "considering" a "package of measures" which will be "commensurate but robust".