The leader of Yemen's Houthis urged his militia on Sunday to fight on against Yemen's Gulf Arab-backed government, dismissing its recapture of Aden last month as a "limited" achievement made possible by Ramadan.

In a speech live on television apparently aimed at shoring up the morale of his men, Abdel-Malek al-Houthi accused his foes of resorting to alliances with both the Islamic State militant group and Israel in their assault on the southern port city.

Houthi said Aden's fall occurred only because some Houthis and allied fighters had returned home to be with their families at the end of the Muslim holy month of Ramadan. He said a political solution to the country's war was still possible.