The incident is France’s deadliest terror attack in at least two decades.
French president François Hollande has said the shooting was "undoubtedly" a terrorist attack. It is thought one motivation for the attack may have been some of the controversial cartoons the magazine has published, including some caricatures of the prophet Muhammad. However no group has yet come forward to claim responsibility for the attack and the gunmen remain at large.
Twitter users shared several of these moving cartoons as a tribute to the victims of the killings.