French police have been criticised for detaining an eight-year-old who claimed to support the men who attacked the satirical weekly Charlie Hebdo.

A French man wanted in connection with deadly terrorist attacks in Paris has been extradited from Bulgaria to France, where he is facing charges of links to terrorism, judicial officials say.

Bulgarian authorities say they have arrested a French citizen believed to have links to one of the brothers suspected of the terror attack against the Charlie Hebdo magazine.