Al-Qaida fighters retook on Wednesday two southern Yemeni towns they briefly occupied four years ago, residents and local fighters said, exploiting the collapse of central authority in Yemen in its eight-month war.

In an early morning surprise attack on the Abyan province capital Zinjibar and neighboring town of Jaar, the militants overcame local forces and announced their takeover over loudspeakers after dawn prayers.

Residents identified them as Ansar al-Sharia, a local affiliate of al-Qaida.