The Metropolitan Police have launched a murder investigation into the death of Sturgess to find out who could be behind the latest chemical attack.
Russia, which is now hosting the soccer World Cup, has denied any involvement in the Skripal case and suggested the British security services had carried out the attack to stoke anti-Moscow hysteria.
Russian Federation denied any involvement in the Skripal incident, and suggested that British police had orchestrated it to stoke anti-Russia sentiments.
She fell sick on June 30 along with another victim, Charles Rowley, who is hospitalized in critical condition. Russia's official Foreign Affairs Twitter account called the accusations an absurd part of the "Russians did it" mantra. Tests showed they were exposed after touching the nerve agent with their hands.More news: All eyes on Froome at epic Tour de France
Assistant Commissioner Neil Basu, the head United Kingdom counter-terrorism policing which is leading the investigation, said he was "unable to say" if the incident in Amesbury is linked to the poisoning of the Skripals on 3 March - but it is their "main line of inquiry".
The poisonings began with a still unsolved attack against former Russian spy and double agent Sergei Skripal and his adult daughter, Yulia, four months ago.
Wiltshire Chief Constable Kier Pritchard said it was a "real concern" that the contaminated container which poisoned Ms Sturgess and her partner had not been found.
Counter-terror police have said their main line of inquiry is whether the two cases are linked, but Mr Williamson went a step further by pointing the finger at Moscow.
Police are working on the theory that Ms Sturgess and Mr Rowley came across an item used to dispense the Novichok and discarded by the would-be assassin or assassins of the Skripals.More news: GOOSEBUMPS 2: HAUNTED HALLOWEEN Trailer
Britain has not directly pointed the finger at Russian Federation in the case involving Sturgess and Rowley, saying the investigation, led by the Counter Terrorism Policing Network, is ongoing. Police said there is no evidence that either Sturgess or Rowley visited any of the sites where the Skripals may have been poisoned.
"We have told our British colleagues that they are playing with fire and they will be sorry", he said.
Following the latest poisonings, Public Health England said the risk to the public remains low, but advised against picking up odd items like needles, syringes and unusual containers.
The hospital's medical director, Dr. Christine Blanshard, said the staff "worked tirelessly to save Dawn".More news: Wimbledon final will not move despite World Cup clash
The police officer added: "The investigation must be led by the evidence available and the facts alone".