Gun attack on French magazine kills 12.

Gunmen have attacked the Paris office of French satirical magazine Charlie Hebdo, killing 12 people and injuring seven in an apparent Islamist attack.

At least two masked attackers opened fire with assault rifles in the office and exchanged shots with police in the street outside before escaping by car.
The gunmen shouted "we have avenged the Prophet Muhammad", witnesses say.
President Francois Hollande said there was no doubt it had been a terrorist attack "of exceptional barbarity".
A major police operation is under way in the Paris area to catch the killers.