Yemeni officials say heavy fighting has broken out in the capital Sanaa between security forces and an army unit that joined the popular uprising against autocratic President Ali Abdullah Saleh. An official from Mr. Salehs military says one man from each side had been killed in the Friday fighting. He spoke on condition of anonymity because he was not authorised to brief the media. The clashes pit Central Security forces under the command of Mr. Salehs nephew against the armys First Armoured Division, led by a general who defected to the opposition in March.