UN chief Guterres urges maximum restraint in Yemen after separatist advance

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FILE PHOTO: UN Secretary General Antonio Guterres speaks with Reuters Editor-in-Chief Alessandra Galloni (not pictured) during the Reuters NEXT conference, in New York City, New York, U.S., December 3, 2025. REUTERS/Brendan McDermid/File Photo

UNITED NATIONS, Dec 17 - United Nations Secretary-General Antonio Guterres on Wednesday urged all parties in Yemen to exercise maximum restraint after an advance by southern separatists that risks rekindling a 10-year-old ‍civil ​war after a long lull.

He also said the operating ‍environment had become untenable in the areas held by the Iran-aligned Houthi movement - Yemens capital Sanaa and ​the ​heavily populated northwest.

The separatist Southern Transitional Council, backed in the past by the United Arab Emirates, says it has taken over the eastern provinces of Hadhramaut and Mahra ‍and is now firmly established across all provinces of the former state of South Yemen.

The ​STC has been an important part ⁠of a coalition fighting alongside the internationally recognised government against the Houthi movement.

I urge all parties to exercise maximum restraint, de-escalate tensions, and resolve differences through dialogue, Guterres said. This includes regional stakeholders, whose constructive engagement ​and coordination in support of UN mediation efforts are essential for ensuring collective security interests.

Guterres, who has just ‌returned from a visit to Saudi ​Arabia and Oman, also condemned the Houthis continued arbitrary detention of 59 U.N. staff, calling for their immediate and unconditional release.

In recent days, Houthi de facto authorities referred three of our colleagues to a special