The US government is offering one million US dollars for help tracking down the son of the late terrorist leader Osama bin Laden.

A State Department notice says the reward will be paid for help locating Hamza bin Laden in any country as part its "rewards for justice" programme.

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The announcement says bin Laden's son has emerged as a leader of the al Qaida terrorist group.

His father was killed in a US military raid in Pakistan in May 2011.

Hamza bin Laden was named a "specially designated global terrorist" in January 2017.

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He has released audio and video messages calling for attacks against the US and its allies.

Al Qaida was responsible for the 9/11 terrorist attacks in the US and other notorious actions.