A 42-year-old woman from Westgate-on-Sea in Thanet has been arrested on suspicion of attempted murder.
Police were called to the Queen Elizabeth The Queen Mother Hospital in Margate after a 32-year-old man was seriously assaulted. Police say his injuries are life threatening.
The woman is still in police custody.
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The news comes as an inquest is due to open for Dawn Sturgess, who died days after apparently coming into contact with Novichok.
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