Hamza bin Laden, believed to be in his mid-20s and reportedly known as the ‘crown prince of terror’, has been touted as a future leader of al-Qaeda.
In the message, which was shared on Twitter, he calls for lone wolf jihadist attacks on America and its allies and marks out London, Washington, Paris and Tel Aviv as specific targets.
The message made no mention of Isis.
Rita Katz, director of Site, a terror intelligence group, tweeted: "Hamza Bin Laden, son of Usamah bin Laden [sic], gives strategies in continuing global jihad in audio message.