The urgent appeal marks exactly two years since the Houthis initiated a widespread restriction targeting personnel from the United Nations, non-governmental organizations (NGOs), civil society groups, and diplomatic missions.

According to UN Deputy Spokesman Farhan Haq, 73 UN personnel remain arbitrarily detained. Haq revealed that the situation has already turned fatal, noting that one UN staff member has died in detention, while several other colleagues are currently being held incommunicado.

The UN chief warned that the ongoing detentions are actively sabotaging vital humanitarian operations in the war-torn nation.

"These actions violate international law, cause deep suffering to families, and have severely constrained the ability of the United Nations and its partners to assist millions of people in need across Yemen," said the statement.

The UN reminded detaining authorities that all personnel, including those who are nationals of Yemen, possess legal protection from prosecution regarding conduct within the scope of their employment.

Moving forward, Guterres underscored the critical importance of continued dialogue and engagement with the Houthis.

The UN stated it will pursue all possible avenues to safely secure the captives and enable the immediate resumption of stalled humanitarian and development activities.

Despite the severe restrictions, Haq noted that the secretary-general remains steadfast in the United Nations' commitment to supporting the people of Yemen and their aspirations for a just and lasting peace.