Taiz, a city under siege
Yemen's second city and cultural capital Taiz has been besieged by Houthi forces for almost 18 months.
The United Nations has condemned the brutal siege. The UN's Under-Secretary for Humanitarian Affairs and Emergency Relief Coordinator Stephen O'Brien said in a statement that "some 200,000 vulnerable civilians are living under a virtual state of siege".
"Houthi and popular committees are blocking supply routes and continue to obstruct the delivery of urgently needed humanitarian aid and supplies into Taiz city," he said.