The U.N. on Monday made the “extraordinary” decision to pause all operations and programs in northern Saada over security concerns after eight more of its staffers were detained. Houthi rebels in recent months have detained dozens of people associated with the U.N. and various aid groups. 

Source: https://www.france24.com/en/middle-east/20250211-un-suspends-aid-work-in-houthi-stronghold-over-security-concerns-yemen