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Russian state TV was practically foaming at the mouth, screaming about striking Washington, drowning London, and turning America into "nuclear ash."

She also told the BBC her cat needed to be put down after straying into the police forensic tent during the search and began "convulsing and foaming at the mouth".

Ms Benson said her son started foaming at the mouth and coughing up blood, so she decided to try to bring him to hospital herself.

Mr Parsons, of the South Western Ambulance Service, said when he checked Ms Skripal she had a “slow heart rate” and was “foaming at the mouth”.

The partner of Novichok poisoning victim Dawn Sturgess found her laying fully clothed in the bath “convulsing and foaming at the mouth,” an inquiry has heard.