Yemeni officials say a suicide car bomber has targeted the convoy with the governor and police chief of the southern port city of Aden but the two survived the assassination attempt unharmed.

The officials say the attack took place early on Friday as Gov. Aidarous al- Zubaidi and security chief, Shalal al-Shayaa, were en route to the district of al-Buriqa.

The officials say a guard was wounded and noted unconfirmed reports of civilians killed. They spoke on condition of anonymity because they aren't authorized to talk to reporters.

The two Aden officials have been targeted in the past. Their predecessors were killed in suicide bombings by the Islamic State group.

Photographs circulated on social media show the bomber's vehicle on fire.

No group has immediately claimed responsibility for the attack.