Osama bin Laden’s closest relatives are living in a secret compound in Iran, members of the family said on Tuesday.

They include a wife and children who disappeared from his Afghan camp at the time of the 9/11 attacks on the United States.

There has been uncertainty about the family’s whereabouts for the past eight years, with reports that some of the children had been killed in bombings, while others had joined their father in planning terrorist attacks. However, relatives said that they found out last month that the group, including one of Osama’s wives, six of his children and 11 of his grandchildren, had been kept in a high-security compound outside Tehran.

They have been prevented from contacting the outside world while Iran has repeatedly denied that any of the relatives were living in the country.

Omar Ossama bin Laden, 29, the al-Qaeda leader’s fourth-eldest son, said he had no idea that his brothers and sisters were still alive until they called him in November.

They told him how they had fled Afghanistan just before the 9/11 attacks and walked to the Iranian border. They were taken to a walled compound outside Tehran where guards said they were not allowed to leave “for their own safety”. The eldest of the children, Saad, was 20 at the time, Ossman 17, Muhammad 15, Fatma 14, Hamza 12, Iman 9, and Bakr, 7.

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