The United Nations has suspended all official movements of its personnel in Houthi-controlled areas of Yemen following a wave of detentions targeting UN staff and aid workers. 

The decision comes amid growing concerns over the safety of humanitarian personnel operating in regions under the control of the Houthi group, also known as Ansar Allah.

According to UN officials, more than 60 employees from UN agencies, international NGOs, and local civil society organizations have been arbitrarily detained since mid-2024. Many have been held incommunicado, without access to legal representation or contact with their families, raising fears of enforced disappearances.

Julien Harneis, the UN Resident and Humanitarian Coordinator for Yemen, announced the suspension of staff movements as a precautionary measure, stating: “To ensure the security and safety of all its staff, the United Nations has suspended all official movements into and within areas under the de facto authorities' control… this measure will remain in place until further notice”.

The detentions have sparked international condemnation, with the UN Security Council and humanitarian organizations demanding the immediate and unconditional release of all detainees. 

The Houthis have reportedly accused some of the detained workers of espionage and referred them to a state security prosecution in Sanaa, prompting fears of politically motivated trials and possible death sentences.

Human rights groups warn that the crackdown on aid workers could severely disrupt humanitarian operations in northern Yemen, where millions rely on UN-supported food, health, and shelter programs. The situation has also led to an exodus of local staff, with many fleeing to government-controlled areas or seeking asylum abroad.

The UN and its partners continue to engage with Houthi authorities through diplomatic channels, urging respect for international humanitarian law and the protection of aid personnel. However, the escalating risks have forced several organizations to scale back operations or relocate offices to safer regions.