Al Qaeda executed 15 soldiers loyal to Yemen's President Abd-Rabbu Mansour Hadi on Saturday.

The soldiers were detained by militants while traveling from the southern port of Aden to al-Mahra province in eastern Yemen via Ahwar, a city in Abyan province under al Qaeda control, according to local officials and residents. 

The militants took them to a remote area and killed them by firing squad. Local sources said 17 other captive soldiers were wounded in the incident but were believed to be still alive. Their current status was unclear.

The soldiers had been visiting family in Aden and were on their way back to base in al-Mahra to receive their salaries, said security sources. They were not dressed in military uniform and were not riding in military vehicles.

Al Qaeda in the Arabian Peninsula (AQAP) has exploited the Yemeni war to expand areas under its control, seizing Mukalla, the capital of Hadramout province, last year and recruiting more followers.

The Saudi-led military intervention in Yemen, backed by the United States, has helped AQAP become stronger than at any time since it first emerged almost 20 years ago, a Reuters special report revealed last week.

Iran-allied Houthi forces have been battling forces loyal to Yemen's Saudi-backed president Hadi since March 2015 in a conflict that has cost more than 6,200 lives