Pope Francis: 'You cannot insult the faith of others'

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 was 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.

James Reynolds reports from Paris.