PARIS — President Francois Hollande has honored 17 victims killed in Islamic extremist attacks on satirical newspaper Charlie Hebdo, a kosher market, and police a year ago this week, unveiling plaques around Paris marking violence that ushered in a tumultuous year.

Tuesday’s ceremonies come as Charlie Hebdo is releasing a special anniversary issue laced with obscene and offensive cartoons, its surviving artists and columnists vaunting their freedom to lampoon everyone from Muslim fundamentalists to children, politicians, and Catholic priests.

Victims’ families joined Hollande and other dignitaries near the building where Charlie Hebdo staff were holding an editorial meeting when two heavily armed brothers stormed in on Jan. 7, 2015, killing 11 people. The plaque begins: “To the memory of victims of the terrorist attack against freedom of expression.’’

They then paid homage to a police officer killed as he tried to chase down the fleeing gunmen. Spray painted on the sidewalk was a message of support for the Muslim officer, reading “Je suis Ahmed,’’ or “I am Ahmed,’’ in the red, white, and blue of the French flag.

The French president briefly met with some of the survivors of the attack inside the market.

Associated Press