Clashes between Yemeni forces and Al-Qaeda militants in Aden killed at least six people, including four members of the same family, security officials and witnesses said.
A senior Al-Qaeda operative in Yemen with a $5mn US bounty on his head has been killed in one of two suspected American drone strikes in the war-torn country.
Al Qaeda and the Islamic State group both have a presence in Aden, where Islamist militants occupy government buildings and are seen patrolling several districts
Saudi-led air strikes targeting Houthi forces intensified in Yemen, an escalation of a nine-month-old war that follows a rise in tensions between the kingdom and Tehran.
Authorities in Yemen's southern city of Aden imposed a curfew after violence blamed on suspected jihadists killed at least 17 people, pro-government media and security sources said.
Six people were killed in a firefight between Yemeni pro-government forces and Al-Qaeda suspects who were travelling in a vehicle towards Aden.
The pro-government army commander of Yemen's Aden survived a car bombing in the second city that left one of his bodyguards dead.
The Altitude Dormitory facility at Aspetar, the most advanced orthopaedic and sports medicine hospital in the region, is one of the largest of its kind in the world