The vial was the source of a fatal dose of the poison, reads the message.
The police claimed that there is no evidence of the couple was purposely poisoned. Law enforcement officers also note that the suspects left Great Britain after the attack.
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.
Dawn Sturgess, 44, left three kids behind.
'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'.