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Yemeni members of the southern separatist movement, loyal to President Abedrabbo Mansour Hadi, in Aden's northern suburbs. Image Credit: AFP

Sana’a: Armed tribesmen killed 18 Al Houthi militiamen in an ambush in Yemen’s central province of Ibb on Tuesday, residents said, in one of the deadliest ground attacks in over two months of war.

The attack hit a convoy of militiamen and allied army troops in the town of Al Qaida while they were en route to the city of Taiz, a flashpoint of clashes between Yemen’s dominant Al Houthis and armed backers of exiled president Abd Rabbo Mansour Hadi.

A coalition of Arab countries led by Saudi Arabia, seeking to restore Hadi to power, has carried out over nine weeks of air strikes on Al Houthi militiamen who have seized large parts of Yemen.

Al Houthis, hailing from Yemen’s far north, seized the capital in September and fanned out southward, triggering the Arab military intervention.

Gulf Arab states accuse Al Houthis of being a proxy for the influence of their regional rival Iran.

Saudi-led air strikes hit Al Houthi positions along Yemen’s far northern border with the kingdom and struck military bases aligned with the group in the capital Sana’a on Tuesday.

Neighbouring Oman, a neutral power, is mediating talks between Al Houthi and American officials in the capital Muscat aimed at ending Yemen’s conflict.

The dialogue also led Yemeni authorities to release to Oman on Monday a detained American freelance journalist.

Yemeni politicians say the discussions are narrowing ground between Yemen’s exiled government and Al Houthis and may soon pave the way for more formal United Nations-backed negotiations.