Paris attacks: Pope Francis says freedom of speech has limits

The pontiff told journalists his assistant could expect a punch if he cursed his mother.

Pope Francis has defended freedom of expression following last week's attack on French satirical magazine Charlie Hebdo - but also stressed its limits.

The pontiff said religions had to be treated with respect, so that people's faiths were not insulted or ridiculed.

To illustrate his point, he told journalists that his assistant could expect a punch if he cursed his mother.

The remarks came as funerals were held for four people killed in the attack by militant Islamists.