LONDON—British counter-terrorism police said on July 13 they believed they had found the source of the Novichok nerve agent that killed a woman in southwest England and left her partner critically ill in hospital.
Dawn Sturgess, 44, died just over a week after she was exposed to Novichok this month near the city of Salisbury, where Russian double agent Sergei Skripal and his daughter, Yulia, were struck down with the same poison in March.
