At least 12 people were killed during a shooting at the headquarters of the satirical Charlie Hebdo weekly in Paris, police say.
Speaking to reporters at the scene, President François Hollande said this was a "terrorist operation" in which journalists were "cowardly assassinated."
"France today faced a shock," Hollande said, according to a BBC interpreter. "Today I'm thinking about the victims."
France 24 reports that the incident began when two gunmen opened fire on the offices before fleeing. France has beefed up its security posture, which Hollande said would help them apprehend those who perpetrated the attack.
Charlie Hebdo is a magazine that's faced threats over its content in the past. Back in 2011, the weekly printed a drawing of the Prophet Muhammad. Afterward, its offices were destroyed in a petrol bomb attack.