A senior UN official has called for parties involved in the war in Yemen to allow "sustained and unimpeded humanitarian access" for the millions of Yemenis facing famine and battling disease.
The situation is steadily deteriorating, with cases of malaria, dengue fever and diphtheria starting to appear in health centres around the country.
Aid workers say the continuing Saudi-led blockade, which began in October in response to a missile fired by the Houthis towards Riyadh, is limiting vital supplies of fuel, food and medicine, making treatment of the afflicted almost impossible.
Al Jazeera's Mohammed Jamjoom reports.
