Many European newspapers republished cartoons from the French satirical weekly Charlie Hebdo to protest against killings by Islamist militants seen as an attack on freedom of expression and the continent's tradition of visual satire.

But most front pages expressed solidarity with the 12 people, journalists and police, killed in Wednesday's attack by publishing their own cartoons and editorials that veered away from Charlie Hebdo's more provocative sketches mocking Islam.

The editorial stances highlighted differences over how publishers respond to the shootings and raised questions over whether many were already self-censoring for fear of causing offence or, worse still, triggering an Islamist backlash.

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