NEW : The provincial governor blames al Qaeda for the blast . Officials say scores are dead and 85 people are injured , some critically . Witnesses report that half of those killed were women and children . Score: 6
NEW : The provincial governor blames al Qaeda for the blast . Officials say scores are dead and 85 people are injured , some critically . Witnesses report that half of those killed were women and children . The blast Monday comes after months of demonstrations in Yemen .