The rebels, known as Houthis, meanwhile accused the Saudi-led coalition of bombing a displaced persons camp in the northern rebel stronghold of Saada, killing 40 people, including women and children. The report was carried on the rebels' TV network.
However, witnesses told The Associated Press that the camp used to house displaced people from an earlier conflict that ended five years ago is now occupied by Houthi forces and that most of those killed were fighters.
Aden, the economic center of the Arab world's poorest nation, was declared the provisional capital by embattled President Abed Rabbo Mansour Hadi before he fled the country last week.
The Houthis overran the capital Sanaa in September. They are allied with former president Ali Abdullah Saleh, who stepped down following a 2011 Arab Spring uprising but has maintained influence through loyalists in the security forces.
Yemeni security officials say the combined force of Houthis and Saleh loyalists is positioned about 30 kilometers (19 miles) east of Aden, near the southern city of Zinjibar.
