The Yemeni government on Thursday renewed calls for moving all UN offices from the country's provinces controlled by the Houthi rebel militia to the southern port city of Aden.

One key reason for the economic collapse in the government-controlled provinces is that international organizations continue to work in the Houthi-controlled Sanaa, as well as distribute project funds and humanitarian relief there, said Minister of Social Affairs and Labor Mohamed Al-Zauri.

"With the support of the Saudi Arabia-led coalition, Aden witnessed continuous improvement and it is standing currently as the main center for the offices of the United Nations and other international organizations," an official of Aden's local authority told Xinhua on condition of anonymity.

Aden is considered Yemen's temporary capital where the Saudi-backed Yemeni government has been based since 2015.

Yemen has been mired in a civil war since the Iran-backed Houthi militia overran much of the country militarily and seized all northern provinces, including the capital Sanaa, in 2014.