British police say they have finally found the source of the deadly nerve agent that killed a woman and left her partner fighting for his life in Amesbury, England: A bottle.
In a statement, Scotland Yard said: "On Wednesday 11 July, a small bottle was recovered during searches of Charlie Rowley's house in Amesbury".
Former Russian spy Sergei Skripal and his daughter Yulia were found unconscious on a bench in Salisbury on 4 March after being exposed to novichok.
Sturgess died on Sunday in hospital.
Sturgess' partner Charlie Rowley, 45, remains in a critical condition but has regained consciousness.
It was taken for tests where scientists confirmed the bottle contained Novichok.
"This is clearly a significant and positive development".
Police are still looking into where the bottle came from and how it came to be in Rowley's house.
"However, we can not guarantee that there isn't any more of the substance left", said Assistant Commissioner Neil Basu, Head of UK Counter Terrorism Policing.
Further tests will now be carried out, the force said. "However, we can not guarantee that there isn't any more of the substance left" Basu said. The container is believed to have poisoned the Wiltshire couple four months after a nerve agent attack against Sergei and Yulia Skripal in Salisbury.
The British government previously blamed the attempted assassination of Sergei Skripal on Russian Federation, which Russia denies.
Britain has invited independent technical experts from the worldwide chemical weapons watchdog to travel to the United Kingdom early next week to independently confirm the identity of the nerve agent, the British Foreign Office said on Friday.
Public health officials say the risk to the public is low, but advised people not to pick up any unusual items.