Islamic State has claimed responsibility for a suicide bombing on Sunday that killed up to 49 Yemeni soldiers in the southern port city of Aden.
Officials said the soldiers were queuing to collect salaries near a military base in the Khor Maksar district when the attacker blew himself up. At least 60 other troops were wounded, they said.
It comes eight days after an attack by Isis killed 50 troops nearby in Aden.
Aden is the temporary capital of Yemen’s internationally recognised government in exile in neighbouring Saudi Arabia.
The administration has struggled to establish its control in the city as militants have launched dozens of attacks against its forces.
Al-Qaida and Isis have exploited nearly two years of war in the impoverished country to carry out assassinations and bombings, mostly in lawless southern Yemeni areas nominally controlled by the government.
Saudi Arabia and its allies in a mostly Gulf Arab military coalition have been bombing Yemen’s dominant Houthi movement in parts of the country under its control since it drove the government from power in March 2015. They have failed to dislodge the group from the capital, Sana’a.