• Policemen are outside the nerve agent victim Charlie Rowley in Amesbury, Wiltshire
  • British police officers guard a cordon outside the Amesbury Baptist Centre church in Amesbury, England, Wednesday, July 4, 2018
  • Salisbury have begun cleaning the spots related to Skripal poisoning
  • Forensic investigators, wearing protective suits, emerge from the rear of John Baker House, after it was confirmed that two people had been poisoned with the nerve-agent Novichok, in Amesbury, Britain, July 6, 2018
  • People don military hazardous material protective suits during a police search of Queen Elizabeth Gardens in Salisbury, Britain, July 19, 2018
  • Policemen are outside the nerve agent victim Charlie Rowley in Amesbury, Wiltshire
  • (FILES) In this file photo taken on April 20, 2018 a laboratory technician controls a test vial at the OPCW (The Organisation for the Prohibition of Chemical Weapons) headquarters in the Hague, The Netherlands, on April 20, 2017
  • British police officers stand outside a residential property in Amesbury, England, Wednesday, July 4, 2018
  • Emergency service personnel are seen cleaning the spots related to alleged poisoning of the Skripals in Salisbury. File photo
  • Forensic investigators, wearing protective suits, emerge from the rear of John Baker House, after it was confirmed that two people had been poisoned with the nerve-agent Novichok, in Amesbury, Britain, July 6, 2018
  • A police officer stands in front of screening erected behind John Baker House as forensic tents are erected, after it was confirmed that two people had been poisoned with the nerve-agent Novichok, in Amesbury, Britain
  • A sign on the wall at the entrance to the Russian Embassy in London. (File)
  • Forensic investigators, wearing protective suits, emerge from the rear of John Baker House, after it was confirmed that two people had been poisoned with the nerve-agent Novichok, in Amesbury, Britain, July 6, 2018
  • Bristol vodka Novichok
  • U.S. President Donald Trump, center right, and Russia's President Vladimir Putin, center left, talk during the family photo session at the APEC Summit in Danang, Saturday, Nov. 11, 2017
  • Various police, Army and other emergency service personal attend a scene in Durrington near Salisbury, England, Monday March 19, 2018, as a car is taken away for further investigation into the suspected nerve agent attack on Russian double agent Sergei Skripal and his daughter Yulia
  • Fire and Rescue Service personel arrive with safety equipment at the site of a housing estate on Muggleton Road, after it was confirmed that two people had been poisoned with the nerve-agent Novichok, in Amesbury, Britain, July 6, 2018
  • A police officer stands in front of Amesbury Baptist Church, which has been cordoned off after two people were hospitalised and police declared a 'major incident', in Amesbury, Wiltshire, Britain, July 4, 2018
  • Police officers guard outside a branch of Boots pharmacy, which has been cordoned off after two people were hospitalised and police declared a 'major incident', in Amesbury, Wiltshire, Britain, July 4, 2018
  • A police officer stands in front of Amesbury Baptist Church, which has been cordoned off after two people were hospitalised and police declared a 'major incident', in Amesbury, Wiltshire, Britain, July 4, 2018