Muslims around the world are using Twitter to reassert the image of the Prophet Muhammed in the wake of the Charlie Hebdo shootings.
The hashtag #WhoIsMuhammad is trending on Twitter on the same day that 5 million copies of the French satirical magazine went on sale depicting the Prophet on its front cover.
Orthodox Islamic doctrine forbids depiction of all prophets to prevent them becoming objects of idolatry.
A heated debate has raged once again about where the line between freedom of speech and offending religious sentiments should be drawn.
The gunmen in the attack on Charlie Hebdo's headquarters shouted: "We have avenged the Prophet Mohammed, we have avenged the Prophet Mohammed, we have killed Charlie Hebdo."