A video has emerged purportedly showing the gunmen involved in the attack on the Paris offices of satirical magazine Charlie Hebdo.
At least 12 people are confirmed to have died, with police spokesman Rocco Contento confirming to Liberation that nine magazine staff were killed in the attack, as well as two police officers. Five others are believed to be critically injured.
The attackers, whose faces were covered, are so far still on the run.
The video below shows what appears to be two gunmen on the streets around Charlie Hebdo's building shouting "Allahu Akbar", which means "God is greatest" in Arabic.
Note: The video is not graphic but some may find it distressing.
The magazine, which some have compared to the UK's Private Eye, has previously been attacked after it published a series of cartoons featuring Mohammed.
The last tweet published by Charlie Hedo's account takes a sideswipe at the Islamic State leader Abu Bakr al-Baghdadi, though given the time it was published (10:28 GMT) it is unlikely to have acted as a provocation.