Rights groups have criticized Egypt for allegedly continuing to detain up to 2,400 people in the investigation into last October's Taba Hilton hotel bombing.
U.S.-based Human Right Watch says that some of the detainees have been tortured and all have been held some 16 weeks without communication with lawyers or their families.
During a news conference with local rights groups in Cairo Tuesday, Human Rights Watch said Egyptian officials have not confirmed the mass detentions in northern Sinai, but they have defended such tactics by citing methods used against terrorism suspects by the United States and Israel.
The attacks last October on the Taba Hilton and two other resorts in the Sinai killed 35 people and wounded more than 100, mostly Egyptian and Israeli tourists.
Some information for this report provided by AP and Reuters.
