The decision was taken by Paris Mayor Anne Hidalgo following the deadly attack in which a man ploughed his car into pedestrians on London's Westminster Bridge then leapt out and stabbed a policeman, killing three people and wounding more than 20.
Hidalgo had earlier expressed her "solidarity" in a message to her London counterpart Sadiq Khan, adding: "Paris and London have very close links which have become stronger in the last few decades."
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