A French rights group sought on Tuesday to block the loading of what it said were munitions onto a Saudi Arabian ship docked in southern France, as pressure mounts on Paris to stop military sales to the kingdom.

ACAT said in a statement it had filed a legal challenge to prevent the vessel from taking delivery of its cargo.

"The Bahri Tabuk is due to load French weapons for Saudi Arabia, one of the main belligerents in the Yemeni conflict. ACAT is .... mobilizing and calling on civil society and local networks to prevent these munitions from going to Saudi Arabia," it said.