Thirteen shells had been launched on Friday, targeting several areas including Jizan’s airport, the report stated, adding that military equipment had also been destroyed.

It is yet unknown whether there are casualties.

A Saudi-led alliance has been bombing Yemen’s Houthi militia and allied army units loyal to deposed leader Ali Abdullah Saleh since March 26 in an attempt to restore exiled President Abdrabbu Mansour Hadi to power.

Saudi forces and the Houthis have been trading fire across the border since the Arab alliance began its military operations.

On Friday, Saudi-led air strikes and clashes in Yemen’s second city of Aden killed 13 Shiite Houthi militia and eight pro-government fighters, military sources told Agence France-Presse.

War planes struck Houthi positions in the north of the port city, killing six fighters, after fighting killed seven rebels and eight soldiers loyal to Hadi, the sources said.

The clashes followed Houthi advances in west Aden, backed by renegade troops that saw the militia take control of a military base late Thursday.

The European Union and United States have recently appealed for a pause in the war to enable aid deliveries to stricken civilians.