Members of the tribes and popular committees launch rockets against positions of the Houthi rebels.

Fierce clashes between Iran-backed Houthi rebels and pro-government forces killed dozens across south Yemen on Saturday, threatening to derail a humanitarian cease-fire drawn up to bring vital aid to the war-wracked country.

In the latest violence, at least 12 civilians were killed and 51 wounded when the Houthis shelled several neighborhoods in Yemen’s third city of Taez, military and local sources said.

The clashes came after overnight fighting killed 26 Houthi rebels and militiamen loyal to deposed President Ali Abdullah Saleh as well as 14 pro-government forces, military sources said.

Some aid has begun to trickle into Yemen since the pause in fighting, but residents of areas where clashes persist complain they remain without the most basic supplies. The fighting in Taez forced many to flee to the countryside.

“Humanitarian aid hasn’t reached Taez, where we haven’t received fuel, food or medical equipment,” said a government official in the city.

And in southern Daleh province, five Houthis were killed overnight when their convoy was ambushed, an official said.

Morocco’s armed forces, meanwhile, said they have located the body of one of their pilots downed over Yemen. A plane has been sent with DNA experts to identify the body of Yassine Bahti, whose F-16 was shot down Monday.

The Yemeni embassy in Riyadh held Saturday a press conference announcing a series of measures taken ahead of peace talks.

Abdul Aziz Jabari, the head of the committee preparing for the talks, said the dialogue would result in effective decisions that would be obligatory for all parties.

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