Turkey's state-run news agency says the Istanbul chief prosecutor's office has launched an investigation into two journalists who featured Charlie Hebdo's cover with the image of the Prophet Muhammad in their columns.

The Anadolu Agency said Thursday the prosecutors were investigating whether Ceyda Karan and Hikmet Cetinkaya violated laws against "inciting hatred and enmity" and "insulting religious values." The two write for the pro-secular newspaper Cumhuriyet, which on Wednesday printed a selection of cartoons and articles in a show of solidarity with Charlie Hebdo. The four-page pullout did not feature the satirical weekly's controversial cover depicting the Prophet Muhammad.

The prosecutors' move came hours after Prime Minister Ahmet Davutoglu said his government would not permit "insults to our prophet."