Flags at all UN offices in Yemen are flying at half-mast this week following the death of a World Food Programme (WFP) staff member who had been arbitrarily detained by the Houthi de facto authorities in the north since last month.Flags at all UN offices in Yemen are flying at half-mast this week following the death of a World Food Programme (WFP) staff member who had been arbitrarily detained by the Houthi de facto authorities in the north since last month. UN News – Global perspective Human stories