French satirical magazine Charlie Hebdo on Wednesday said it would release nearly a million copies of a special issue to mark a year since jihadists killed a dozen people in its Paris offices.

The 32-page double issue -- featuring a selection of drawings by the cartoonists who died in the attack, as well as by current staff and messages of support -- will be released on January 6.

The provocative weekly became a household name when two Islamist brothers gunned down 12 people at its offices over its cartoons lampooning the Prophet Mohammed.

A survivors' edition released a week after the January 7, 2014, attacks sold a record 7.5 million copies and boosted the magazine's circulation.

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Charlie Hebdo said it had already received large orders for the new special issue from overseas, including 50,000 from Germany.

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Currently it sells around 10,000 copies internationally and about 100,000 in French newsagents, along with some 183,000 subscriptions.