Death toll in attack on Salafi-held town in Yemen rises to 24 SANAA (Reuters) - The death toll from a Houthi Shi'ite attack on a mountain town in northern Yemen held by their Salafi Sunni Muslim rivals has risen to 24, a Salafi spokesman said on Thursday, as the two sides fought for a second day. Abu Ismail al-Hajouri said more than 100 people were also wounded in Damaj, which he said the Houthi rebels, who dominate the northern province of Saada, had besieged for weeks. He said most of the casualties had been inflicted in the past two days when rockets and tank shells hit a mosque and dormitories for students at a nearby religious school. He said Salafis were fighting back with light automatic weapons. There was no independent account of the clashes and no immediate report on any Houthi casualties. Fighting erupted on Wednesday despite government mediation efforts to shore up a truce in place since late last year in a province long beyond the control of the authorities in Sanaa. A Houthi statement late on Wednesday accused the Salafis of igniting strife by bringing thousands of foreign fighters to Damaj, which lies near Saada, a Houthi-controlled city near the Saudi border some 130 km (80 miles) north of the Yemeni capital. The Salafis say the foreigners are students there to study Islamic theology in a seminary built in the 1980s. "Many of the wounded are in serious condition and we can't move them to hospitals because the Houthis are surrounding the area," Hajouri, the Salafi spokesman, said by telephone. The Houthis blockaded Damaj for weeks last year, accusing the Salafis of stockpiling weapons, a charge they deny. A member of a mediation committee set up by President Abd-Rabbu Mansour Hadi blamed the Houthis for the latest flare-up. "The Houthis caught the Salafis by surprise when they bombed Damaj with heavy weapons," he said, declining to be named. We are trying to stop the confrontations. Officials said fighting continued around Damaj on Thursday, and the government urged all parties to cease violence. Saada province is the base for a long-running Houthi rebellion against the Yemeni government. Some Sunnis fear the Houthis, who are named after their late leader, Hussein Badreddin al-Houthi, want to revive the 1,000-year Zaydi Imamate, whose rulers claimed descent from the Prophet Mohammad. On Thursday, suspected al Qaeda militants attacked an army checkpoint in the southern province of Abyan, killing three soldiers, a local official and residents said. They said the assailants had withdrawn taking their casualties with them. Reporting by Mohammed Ghobari; Additional reporting by Mohammed Mukhashaf in Aden; Writing by Mahmoud Habboush; editing by Sami Aboudi and Alistair Lyon