It is expected that the investigation will last for several weeks, and even months.
Law enforcers are looking for other possible places or sources of infection, and collect additional evidence.
We recall, the British police found a small bottle with traces of Novichok in the house of Charlie Rowley, who was poisoned by a nerve agent and is now in bad condition.
Wiltshire police reported new cases of poisoning near Salisbury, similar to the poisoning of ex-officer of the GRU of Russia Sergey Skripal and his daughter Julia in Salisbury on March 4. Man and woman were found unconscious. Both are British citizens.
As reported, the man and woman were poisoned by the paralytic substance Novichok after contact with the infected object.
Later it became known that woman poisoned with Novichok, the Russian-made nerve agent, died at a hospital in Amesbury, England. Metro reported that, referring to Scotland Yard.
Dawn Sturgess, 44, left three kids behind.
The authority looks into the incident.
'Charlie Rowley, 45, who was also exposed to the substance, remains in a critical condition in hospital, police said. They fell ill on June 30 after the exposure to the same type of nerve agent used to poison former Russian spy Sergei Skripal and his daughter Yulia in Salisbury In March. Police suspect they were exposed through a contaminated item left over from the first attack, which Britain blames on Russia', the British outlet wrote. 'Assistant Commissioner Neil Basu, the head of UK Counter Terrorism policing, said: ‘This is shocking and tragic news. ‘Dawn leaves behind her family, including three children, and our thoughts and prayers are with them at this extremely difficult time'.
British Prime Minister Theresa May expressed her condolences, saying she was 'appalled and shocked' with the incident.