Journalist Nolan Peterson’s solemn assurance that Islamic Sharia law is enforced in parts of Paris where the police and non-Muslims dare not go, sparked derision in France, leading
the popular Petit Journal to do a spoof war report from the areas he named.
They came shortly after another Fox guest claimed that the British city of Birmingham is "totally Muslim".
But Hidalgo on Tuesday told Fox’s rival CNN that Paris’s image had been damaged and its honour besmirched.
Legal experts say it may prove difficult to take the case to court, especially in the US where restrictions on free speech are less tight than in France.