Gunmen ambushed a Yemeni army vehicle carrying ammunition to troops in a southeastern Al-Qaeda bastion, killing a soldier and wounding three others, a security official said.
The unknown assailants, who were parked in a car on the side of a road in the town of Taryam in Hadramawt province, opened fire at the vehicle as it passed by, the official said.
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Troops from a nearby military camp then clashed with the attackers, who managed to flee, he added.
Yemen has seen regular attacks on its security forces, usually blamed on the local franchise of Al-Qaeda, which remains active in the south and east despite several military operations and US drone strikes against it.
A military official said earlier this month that militants belonging to Al-Qaeda in the Arabian Peninsula had established hideouts and training bases in the vast Hadramawt province after the army drove them out of cities in the southern province of Abyan in 2012.