Counter-terrorism police in the UK are investigating what's being described as a major incident after an unknown substance has left two people critically ill.
Samples are being sent to experts at a government chemical weapons research laboratory after a local couple in their 40s were discovered unconscious at their house in Amesbury in Wiltshire.
The town is just eight miles from where former Russian spy Sergei Skripal and his daughter Yulia were attacked with the nerve agent Novichok four months ago.
Police have confirmed that no one else has been taken ill, however several sites around the two have been cordoned off as a precaution.
Deputy Chief Constable Paul Mills of Wiltshire police say they are keeping an open mind, as it not year clear if a crime has been committed.
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