The car bomb exploded as the convoy of the Aden governor was passing through the Tawahi district, killing at least five of his bodyguards. The official survived.
"Five people died, four of them bodyguards of Gov. Ahmed Hamed Lamles… The agriculture and fisheries minister, Salem Suqatri, was in the car with him," the source said.
Aden has been the de facto capital of Yemen after Houthi rebels overran Sanaa in the country's north. The port is controlled by the separatist Southern Transitional Council.