The governor of Yemen's second city Aden was killed on Sunday by a car bomb that tore through a residential neighbourhood, a local official and witnesses said, according to AFP.

The attack killed Jaafar Saad and an unspecified number of his bodyguards in the Tawahi district of the major port city, the sources said.

Tawahi has become a stronghold in recent months for jihadists including Al-Qaeda, whose militants have expanded their presence across the city.