Another Novichok nerve agent has struck the U.K. recently, claiming one life and leaving another in critical condition in the hospital. Dawn Sturgess has tragically died, and Charlie Rowley remains in the hospital. Sturgess, 44, was a mother of three.

Last Saturday, Rowley and Sturgess of Amesbury, England were transported to the hospital after being found unconscious. After ruling out drug use or other more usual crimes, and after further testing, the National Counter Terrorism Policing Network were brought in to head up the investigation. It was later confirmed that Novichok was used in this attack.

Authorities are currently searching through the paths taken by Rowley and Sturgess to try to determine the origin of exposure.

Amesbury is under a 20 minute drive from Salisbury, where Sergei and Yulia Skripal were poisoned in March.