Suspected al-Qaeda militants have attacked the intelligence headquarters of Yemen's southern city of Aden killing 14 people.

The militants attacked the building from two sides, firing rocket-propelled grenades and automatic weapons inside.

The "well-planned" attack took place in Aden's coastal Tawahi neighbourhood.

Al-Qaeda remains active in the area, after a security vacuum was created in a year of protests against former president Ali Abdullah Saleh.