A statement from the Three Horseshoes pub said: "The Three Horseshoes will be CLOSED today Saturday 15th February following a tragic incident outside the pub last night, sorry for any inconvenience.
A Kent Police statement said: "Officers attended the scene along with South East Coast Ambulance Service where a woman in her 40s had suffered serious injuries.
Police were called to a report of a disturbance at the Three Horseshoes pub in Knockholt on Friday evening.
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A manhunt has been launched after a woman was seriously injured in an incident in Kent on Valentine's Day.