At least 15 people are reported to have been killed in the latest clashes between police and protestors in southern Yemeni city of Taiz.
A medical source claims forces loyal to President Ali Abdullah Saleh opened fire on demonstrators, injuring hundreds of people outside a municipal building.
Opposition leaders are now also accusing the government of allowing certain cities to fall into the hands of al Qaeda and Islamic militants in order to boost support for the president.
Former defence minister, General Abdullah ali Aleiwa, said: “We condemn and strongly denounce what the regime has done to deliver some of the provinces, to the groups of bandits, saboteurs and terrorists. It’s a desperate attempt, to harm our military corporation.”
Yemen’s air force, however, has reportedly bombed the positions of al Qaeda and Islamic militants who have taken control of the coastal city of Zanjibar.
Despite demands by global and regional powers, President Saleh is still refusing to step down and sign a deal allowing a transition of power.