He's Osama bin Laden's son, the husband of 9/11 hijacker Mohamed Atta's daughter — and now Public Enemy No 1 to the US State Department, which just put a US$1 million bounty on him.

Hamza bin Laden is emerging as a powerful key leader of al Qaeda, continuing his father's mission and a youthful energy to the terror network his dad once led.

America offered a reward for information leading to the capture of Hamza bin Laden with the man sometimes called the Crown Prince of Jihad becoming a rising star in al-Qaeda.

The son of the group's late founder is emerging as a leader in his father's network after he issued a string of exhortations to attack the West, the United States said.

Advertisement

The measures followed the warning last month by Alex Younger, the head of MI6, that al-Qaeda was undergoing a resurgence.

The wanted poster released by the U.S. Department of State Rewards for Justice program. Photo / AP
The wanted poster released by the U.S. Department of State Rewards for Justice program. Photo / AP

As the bearer of the world's most notorious terrorist name, and son of the man behind the 9/11 attacks, his pedigree as jihadist royalty potentially makes him a potent propaganda tool for al-Qaeda.

The group was thought to be trying to capitalise on the destruction of the Isil's caliphate to again become the world's pre-eminent jihadist group, analysts said.

But his lineage alone may not be enough to propel him to the top of the organisation without concrete achievements in jihad.

"Whether he is 'the chosen one' still needs to be seen, but he has become more prominent in the group's media releases during the last three years," said Tore Hamming, a jihadist specialist at the European University Institute. His last name is a major advantage. His father, Osama, still commands incredible respect within the jihadi movement, not just in al-Qaeda, but more broadly. Hamza was always favoured by his father and he has been groomed by the most senior people in al-Qaeda."

The young bin Laden is thought to be aged around 30 years old and is possibly hiding in Afghanistan, Western officials believe.

Eight years after his father was shot dead in a special forces raid on a compound in Abbottabad, in Pakistan, America has now issued a reward for information about his son.

Hamza is believed to be the 15th of bin Laden's 20-odd children and spent his early childhood with his parents, first in Saudi Arabia and then in Sudan and Afghanistan. After the 9/11 attacks, when bin Laden became the world's most wanted man, several wives and children including Hamza were sent for their own safety to live in Iran.

Advertisement

Letters discovered in the Abbottabad compound after the May 2011 raid that killed the older bin Laden showed Hamza had a close bond with his father and wanted to follow in his footsteps. His father in turn appeared to be grooming him for leadership.

At one point Hamza complained of living "behind iron bars" and wanting to join his father's holy war against the West. "What truly makes me sad, is the mujahideen legions have marched and I have not joined them," he wrote.

By the time of his father's death, Hamza had left Iran, but was not living in his father's compound. Instead he was reportedly kept in a separate safe house and was to be sent to Qatar for education.

"Hamza is one of the mujahideen, and he bears their thoughts and worries," his father wrote in one letter.

Hamza went on to swear revenge for his father's death. "If you think that the crime you perpetrated in Abbottabad has gone by with no reckoning, you are wrong," he warned in one recording.

Hamza bin Laden. Photo / AP
Hamza bin Laden. Photo / AP

His status in al-Qaeda was underlined when he was introduced by Ayman al-Zawahiri, the network's leader, as a "lion". His jihadist pedigree has been further burnished by reports he married the daughter of Mohammed Atta, the 9/11 lead hijacker.In one 2015 audio message, he called on jihadists in Syria to unite, claiming that the fight would pave the way to "liberating Palestine." He has also called for the overthrow of the Saudi royal family. Saudi Arabia on Friday said it would revoke his citizenship.

The US reward for information on Hamza bin Laden however remains far lower than the rewards on other al-Qaeda figures, said Daniel L Byman of the Brookings Institution think tank.

Al-Zawahiri, who has a $36 million reward for information, undoubtedly remains al-Qaeda's leader, he said.

"It's a bounty for a prominent figure but it's not a huge bounty compared to his father or previous top-level figures. The thing about him is that there isn't much to know. He's very young, he spent a lot of time in hiding in Iran... and he doesn't have major operational credibility that other figures have," he said. "Right now he's at best a figurehead... while seasoned leaders are trying to recapture their brand, which was much stronger under his father. With that in mind using the Bin Laden name is sensible, the question is can he build on this and go from the son of an important person to an important person in his own right?"