Monday’s explosions at a weapons factory in Yemen are now said to have killed up to 150 people, according to some reports.
The victims included women and children.
Islamist militants had taken over the southern city of Jaar after clashes with the army.
After troops appeared to abandon the city, which is home to several hundred thousand people, local people then flocked to loot the factory which makes bullets.
Doctors say the exact number of bodies is difficult to tell because the charred remains are hard to count.
The Yemeni government has long been fighting an insurgency in the south.
The US and Saudi Arabia have long seen President Ali Abdullah Saleh as an ally in keeping al Qaeda at bay.