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.
As we reported earlier, Sergei Skripal, the former Russian spy, and his daughter Yulia were poisoned in British Salisbury. Later, Theresa May, British PM, stated that Russia was responsible for that, and the investigation has confirmed the use of the Novichok nerve agent, which is produced in Russia.
Great Britain expelled 23 Russian diplomats, which was supported by the USA, Canada, Ukraine and many other European states.