BBC: Novichok that poisoned a couple in Wiltshire came from a small bottle found in the home of one of the victims, police say.
A bottle was found in a search at Charlie Rowley’s Amesbury house and was tested by scientists at Porton Down, the Metropolitan Police said.
Mr Rowley, 45, remains in hospital in Salisbury in a serious but stable condition after falling ill on 30 June.
His partner Dawn Sturgess, 44, died last weekend.
Scientists at the Defence, Science and Technology Laboratory are still trying to establish whether the deadly substance found at Mr Rowley’s house came from the same batch of Novichok that contaminated Sergei and Yulia Skripal in March.