Riyadh: Ten Saudi Guantanamo Bay detainees returned home on Saturday, bringing the number of Saudis remaining in the prison to around 13, the Saudi Interior Ministry said.

Washington has returned dozens of Saudis over the past year in an effort to reduce the numbers detained at the controversial camp ahead of finally closing it.

The treatment of Saudi detainees in Guantanamo Bay has sparked public anger in the kingdom. Two Saudis hanged themselves at the naval base in June.

Saudi Interior Minister Prince Nayef bin Abdul Aziz told the official news agency SPA that the government is working to bring home the remaining Saudi detainees.

Washington has designated Guantanamo prisoners as "enemy combatants" who are denied the prisoner of war status.

Fifteen of the 19 hijackers who carried out the September 11, 2001 attacks on the United States were Saudis and Al Qaida leader Osama Bin Laden himself is Saudi-born.