One person was killed and five injured in clashes between rival football fans after a cup tie near the Moroccan city of Casablanca, local authorities said Wednesday.

"A group of supporters of Wydad Casablanca (club) stopped a vehicle carrying fans of AS FAR Rabat, throwing stones and the situation degenerated," they said in a statement.

They said one person died of his injuries after "falling from on top of the vehicle" and five others were hospitalised.

Police made six arrests over the violence which followed a 3-1 defeat for the home club.