More than two million people have taken to the streets of cities across France, in a show of unity after three days of terror attacks.

Seventeen people were killed during the violence, and police are still hunting one of the people believe to be responsible.

One million people of all faiths and origins marched in Paris, while hundreds of thousands of others staged demonstrations elsewhere.

Fergal Keane reports on one march in Marseille, the French city with the largest population of Muslims.