The United States is offering a reward of up to $1m (£750,000) for information about one of the sons of the late al-Qaeda leader Osama Bin Laden.
Up to $1 million for information on Hamza bin Laden, an emerging al-Qa'ida leader.
Saudi Arabia also announced on Friday it had revoked the citizenship of Hamza bin Laden via a royal decree in November.
Hamza's whereabouts still remains a question.
The announcement said that Hamza has emerged as a leader of the al-Qaeda terrorist group. "He's basically born right after al-Qaida is founded, so his life is totally consumed in the establishment, the formation of al-Qaida and the launching of its war against the West and America".
In January 2017, the State Department had listed Hamza bin Laden as a Specially Designated Global Terrorist, freezing all of his assets based in the United States or in the possession or control of USA persons.
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The department said Hamza has climbed the ranks of al-Qaeda. Other reports have said Hamza is known to have married the daughter of Abu Mohammed al-Masri, a senior al Qaida military leader. In a rare interview past year his family said they believed that he was in Afghanistan. Hamza is son of Usama bin Laden and has threatened attacks against the United States and allies.
Hamza bin Laden began appearing in militant videos and recordings in 2015 as an al-Qaida spokesman.
In recent years, ISIS - which began as Al Qaeda in Iraq before breaking away from the terror group - has taken much of the worldwide attention. They reportedly still stay in touch with Bin Laden's mother, Alia Ghanem.
His addition to the sanctions list subjects him to a travel ban, asset freeze and arms embargo that all United Nations member states are obligated to enforce.
Al-Zawahiri became the leader of al-Qaida after the death of Osama bin Laden.
In this photo made available on March 19, 2004, Osama bin Laden is seen at a news conference in Khost, Afghanistan, in 1998. "While there is as yet little evidence of a re-emerging direct global threat from al-Qaida, improved leadership and enhanced communication will probably increase the threat over time".