An employee of a printing house holds a copy of the latest edition of French weekly newspaper Charlie Hebdo with the title "One year on, The assassin still on the run" near Paris, France, January 4, 2016. [Photo/Agencies]

On her tweeter account, former president of the Christian Democratic Party (CDP), Christine Boutin, regretted the magazine "obsession" for religion.

"At Charlie Hebdo commemoration. Those targeted? Religions. It becomes an obsession. The drama deserved better (edition)," she tweeted.

Last year, two masked and armed men stormed offices of the satirical magazine, known for mocking radical Islamists. They killed 12 people among them the newspaper's main four cartoonists.

In 2011, Charlie Hebdo's office was fire-bombed after printing on its cover an image of the Prophet Mohammad.

Earlier on Tuesday, French President Francois Hollande unveiled a plaque "in memory of the victims of the terrorist attack against freedom of expression" in the magazine's previous headquarters in Paris 11th district.

The memorial plaque which included the names of the killed journalists was the first of a series of ceremonies to honor those murdered last year's Jan. 7-9 attacks, and also of the 130 victims of Nov. 13 assaults claimed by the Islamic State (IS).