LONDON-British counter-terrorism police said on Saturday they had recovered more than 400 items as part of their investigation into the murder of a woman in southwest England who was poisoned by the Novichok nerve agent.
Mr Matthew Rowley told BBC News that his 45-year-old brother Charlie, who is conscious but seriously ill in hospital, told him he had picked up the perfume bottle.
It is not yet clear where the contaminated bottle came from, or how it came to be in Mr Rowley's home where it was eventually found by police.
Dawn Sturgess and Charlie Rowley, were found unconscious.
Commissioner Neil Basu said that police could not disclose further information about the bottle that was discovered.More news: Meghan's Dad Says He's Been Cut Off — Thomas Markle Interview
Former Russian spy Sergei Skripal and his daughter were poisoned with the Novichok nerve agent in Salisbury in March, and two Britons fell ill this month after exposure to the same nerve agent.
Police announced on Friday that "scientists have now confirmed to us that the substance contained within the bottle is Novichok".
The police said further testing was trying to establish whether the substance that affected Rowley and Sturgess was from the same batch as was used against the Skripals.
Rowley is now recovering in the same Salisbury hospital that treated and released the Skripals.
Basu said Friday that cordons would remain in place in some locations to protect the public despite the apparent breakthrough in the case. "However, we can not guarantee that there isn't any more of the substance left", Basu said.More news: Iran builds new nuclear centrifuge rotor factory, nuclear chief says
Detectives said they were still trying to find out where the bottle came from, and why it ended up in the house.
Wiltshire Chief Constable Kier Pritchard welcomed the development, describing it as "significant and encouraging".
The UK government still remains adamant that Russian Federation is behind the poisoning attack on Sergei Skripal and his daughter Yulia in March.
Britain's Foreign Office said Friday that the United Kingdom has asked the Organization for the Prohibition of Chemical Weapons to collect samples for analysis at its labs.
The pair are believed to have handled the container used in the nerve agent attack.More news: It will be the most surreal US-Russia summit in history
Public Health England reiterated its advice to members of the public and urged residents not to touch, or pick up, unfamiliar objects.