Masked gunmen stormed the French satirical weekly Charlie Hebdo on Wednesday, killing 12.
Video, which is allegedly of the deadly attack, is being played by French television news agencies. In the video gunshots are heard along with shouts of "Allahu akbar." (Be cautioned, the footage posted below is rather disturbing.) The gunmen are still at large.
"They will be hunted down as long as necessary," French president François Hollande said Wednesday, at the scene of the attack.
"There is no doubt [this] was a terrorist attack," Hollande also stated.
Charlie Hebdo has previously been threatened due to its caricatures of the Prophet Muhammad. In 2012 naked cartoons of the Prophet sparked fears of riots, and in 2011 the Charlie Hebdo headquarters were firebombed after planning to make the cover a caricature of the Prophet Muhammad.