The death of a British citizen, caused by a Soviet-era nerve agent that could have been brought to English soil by Russians, comes at a particularly sensitive time.
Dawn Sturgess, 44, who somehow came into contact with Novichok, died at a hospital in south England yesterday where she was being treated for exposure to the military-grade chemical weapon. Prime Minister Theresa May said she was "appalled and shocked," and announced a murder investigation.
Sturgess was one of five people who became seriously ill after being exposed to the nerve agent in the Salisbury area.
Former Russian spy and double agent Sergei Skripal and his daughter, Yulia, were poisoned four months ago in what British authorities deemed a deliberate attack. After reviving from comas, both were released. A police sergeant involved in the investigation was hospitalised and released.
Sturgess' death comes as US President Donald Trump prepares this week to travel first to Brussels for a Nato summit, then to the London area for meetings with May and the Queen, followed by a meeting with Russian President Vladimir Putin in Helsinki next Monday. England is also preparing to play in a World Cup quarter final match in Moscow. British government officials decided to boycott the games after the Skripal poisonings.