French satirical weekly Charlie Hebdo will mark a year since the jihadist attack on its offices with a cover featuring a bloodied, gun-toting, bearded God figure, under the headline: "One year on: The assassin still at large".

One million copies of the special edition will go on sale in France Wednesday, on the eve of the first anniversary of the killing of 12 people at the magazine's Paris offices by brothers Cherif and Said Kouachi, AFP reports.