<h1>Humanitarian access undermined as an aid worker dies in detention, prompting suspension of UN operations in northern Yemen.</h1> An aid worker with the World Food Programme died while detained by Houthi authorities in Saada; the WFP described the detention as arbitrary and called for release of UN staff. In response to further detentions and insufficient security guarantees, the United Nations suspended all humanitarian operations in northern Saada, affecting multiple UN agencies and international aid organisations and raising immediate concerns about humanitarian access and continuity of assistance.