Gunmen have attacked the Paris office of French satirical magazine Charlie Hebdo, killing 12 people and injuring seven. Four of the magazine's well-known cartoonists, including its editor-in-chief Stephane Charbonnier were reported among those killed, as well as at least two police officers. French media have named the three other cartoonists killed in the attack as Cabu, Tignous and Wolinski.

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