The suspect, identified as Abdallah Salah al-Harbi, was detained by Iraqi border guards in the Samawa area, in southern Iraq.

Suicide bombers attempted to penetrate the world's largest oil-processing plant at Abqaiq, in the oil-rich eastern Saudi province, on Friday but their attack was thwarted leaving two security men dead. The two would-be suicide bombers were also killed.

An Al-Qaeda statement posted on the Internet claimed responsibility for the attack.