RIYADH (AFP) - Saudi authorities have rearrested nine militants, including former inmates of the US military detention centre at Guantanamo Bay in Cuba, the interior ministry said. The ministry in a statement late Sunday said the nine Saudi nationals had undergone a rehabilitation programme for the militants arrested in the kingdom and for returnees from the notorious US prison. "Since the start of the rehabilitation programme, nine people, who had taken part in the programme, have been rearrested," a ministry official told state news agency SPA. "Some of them had returned from Guantanamo," the official added. The comments come in the wake of reports that two men who had been released from Guantanamo and went through the rehabilitation programme had resurfaced in Yemen and had rejoined Al-Qaeda. A US counter-terrorism official told AFP that one of the two, a Saudi identified as Abu Sufyan al-Azdi al-Shihri, or prisoner number 372, has been elevated to the senior ranks of Al-Qaeda in Yemen. The US Defence Department has said as many as 61 former Guantanamo detainees " about 11 percent of 520 detainees transferred from the detention centre and subsequently released " are believed to have returned to the fight. Al-Qaeda leader Osama bin Laden was born in Saudi Arabia although he was later stripped of his nationality. Fifteen of the 19 plotters of the September 2001 attacks in the United States were Saudis