A suicide bomber attacked a Yemeni military camp run by President Abd-Rabbu Mansour Hadi's government in the southern port city of Aden on Wednesday, killing at least 13 recruits, medical sources and a security official said.
The DAESH terrorist group claimed responsibility for the attack, the latest in a series of bombings to shake the city since Saudi-backed forces seized Yemen's second-largest city from the Iran-allied Houthis in July last year.
"A man detonated his explosive vest among soldiers," a military source said.
At least 60 people were injured in the attack targeting hundreds of new recruits at the Ras Abbas camp in Aden's Buraiqa District.
The soldiers were attending training run by Sudanese forces belonging to the Saudi-led coalition, another military source said.
The bomber was disguised in military uniform used by the new recruits, enabling him to join the crowd undetected inside the camp, an official said.
"The explosion shook the camp violently and it could be heard miles away," one witness told Reuters by telephone.
In a statement published on its online media arm Amaq, DAESH confirmed the incident and published a photo of the attacker it identified as Abu Isa al Ansari, saying the bombing "killed around 20 apostates and wounded 60 others."
Residents said that DAESH had recently warned young Yemenis against joining the army being set up by Hadi's government to train recruits to fight the Houthis.
DAESH has stepped up operations in the Arabian Peninsula as a rival to Al Qaeda, which has been the main militant group in the country in recent years.
Suicide bombings by DAESH terrorists targeting a hotel housing the government in Aden and a mosque in Sanaa caused the deaths of 22 people on October 5.
On Tuesday, Aden's governor and security director survived a gun attack in the city by unknown assailants on his convoy.
Pro-Hadi forces and a Saudi-led coalition have been battling the Iran-allied Houthi militants as well as forces loyal to the country's former leader Abdullah Saleh, based in the capital Sanaa, in a war that has raged for 11 months and in which some 6,000 people have been killed.