The Council of State granted an injunction as the contracts did not meet the standard for "human rights in the end-user country and its respect for international law."

The council nevertheless decided not to block shipments to the Saudi Royal Guard, a separate unit.

In February, the southern Belgian region of Wallonia halted weapons sales to Saudi Arabia's defence ministry and air force over concerns about the conduct of its war in Yemen.

But it said it would continue to supply the two Saudi guard units, arguing that they are more focused on legitimate internal security and bodyguard roles.

Saudi Arabia intervened in the almost five-year civil war in its southern neighbour to support the government side, but the conflict has claimed tens of thousands of civilian lives.

The kingdom is one of the world's biggest arms purchasers, spending billions with the United States and the United Kingdom in particular.

Riyadh depends less on Belgian arms, but is nevertheless Wallonia's number one customer, accounting for 225 million euros ($247 million) in a 950 million euro industry in 2018.

FN Herstal, which makes rifles and machine guns, and John Cockerill (CMI), which specialises in gun turrets for armoured vehicles, employ 4,400 Belgians between them.

The Wallonia regional government is FN Herstal's sole shareholder.