Germany’s highest court has rejected a case brought by Yemeni plaintiffs who argued the German government failed in a duty to protect relatives who they say were killed in a 2012 drone strike against an attack controlled with help from a U.

The Constitutional Court has ruled that Berlin is not in breach of international law over US drone attacks guided from Germany. The case was brought by two Yemenis whose relatives were killed in a 2012 US drone mission.

Berlin is not required to intervene in U.S. drone activities at the Ramstein air base in southwestern Germany, the country's top court ruled on Tuesday in dismissing a complaint brought by Yemeni nationals whose family members were killed in a strike.