A security source said a suspected al Qaeda suicide bomber killed two militiamen at a checkpoint on Monday, in the southern Yemeni city of Aden which has been the place of the conflict of Iran, backed Houthi militias and the forces loyal to Abdurrabu Mansur Hadi.
The source said the suicide bomber approached the militiamen while they were searching cars at a large intersection in the Mansoura district and detonated the vest that caused him and other militiamen to be killed.
Aden is one of the hot spots for the embattled government of Yemen, in where Gulf countries have been launching air strikes to protect themselves against the Iran-backed Houthi group in late March.
A suicide bombing suspected of being carried out by Al Qaeda militants killed 10 soldiers standing guard at an intelligence building in the western Yemeni city of Hodaida on October 16.
"Gunmen believed to belong to Al Qaeda attacked the main gate of the political security building with rocket-propelled grenades and machine guns after a car bomb driven by a suicide bomber attacked the back gate," one of the sources told Reuters.
Both Al Qaeda and ISIS control swathes of territory in Yemen, which has been witnessing intense clashes between the Iranian-backed Houthi militias and the Saudi-led coalition.