WASHINGTON ( CNN ) -- Former terrorist suspects detained by the United States were tortured , according to medical examinations detailed in a report released Wednesday by a human rights group . A U.S. serviceman with his dog watches a detainee at Abu Ghraib prison in Iraq in 2003 . The Massachusetts-based Physicians for Human Rights reached that conclusion after two-day clinical evaluations of 11 former detainees , who had been held at the Abu Ghraib prison in Iraq , at Guantanamo Bay , Cuba , and in Afghanistan . The detainees were never charged with crimes . `` We found clear physical and psychological evidence of torture and abuse , often causing lasting suffering , '' said Dr. Allen Keller , a medical evaluator for the study . In a 121-page report , the doctors ' group said that it uncovered medical evidence of torture , including beatings , electric shock , sleep deprivation , sexual humiliation , sodomy and scores of other abuses . The report is prefaced by retired U.S. Major Gen. Antonio Taguba , who led the Army 's investigation into the Abu Ghraib prisoner abuse scandal in 2003 . Watch why a rights group says there 's evidence of torture » . `` There is no longer any doubt that the current administration committed war crimes , '' Taguba says . `` The only question is whether those who ordered torture will be held to account . '' Over the years , reports of abuses at Abu Ghraib and allegations of torture at Guantanamo prompted the Bush administration to deny that the U.S. military tortures detainees . Since only 11 detainees were examined `` the findings of this assessment can not be generalized to the treatment of all detainees in U.S. custody , '' the report says . However , the incidents documented are consistent with findings of other investigations into government treatment , `` making it reasonable to conclude that these detainees were not the only ones abused , but are representative of a much larger number of detainees subjected to torture and ill treatment while in U.S . custody . '' Four of the men evaluated were arrested in or taken to Afghanistan between late 2001 and early 2003 and later were sent to Guantanamo Bay , where they were held for an average of three years before being released without charge , the report says . The other seven were detained in Iraq in 2003 and released within a year , the report says . All the subjects told examiners that they were subjected to multiple forms of torture or ill treatment that `` often occurred in combination over a long period of time , '' the report says . While the report presents synopses of the detainees ' backgrounds based on interviews with them , the authors did not have access to the detainees ' medical histories . Therefore , there 's no way to know whether any of the inmates may have had medical or mental problems before being detained . Among the ex-detainees was an Iraqi in his mid-40s , identified only as Laith , whom U.S. soldiers took into custody in October 2003 and who was released from Abu Ghraib in June 2004 . According to the report , Laith was subjected to sleep deprivation , electric shocks and threats of sexual abuse to himself and his family . `` They took off even my underwear . They asked me to do some movements that make me look in a very bad way so they can take photographs . ... They were trying to make me look like an animal , '' Laith told examiners , according to the report . According to the report , Laith said the most `` painful '' experiences involved threats to his family : `` And they asked me , 'Have you ever heard voices of women in this prison ? ' I answered , 'Yes . ' They were saying , 'Then you will hear your mothers and sisters when we are raping them . ' `` The examiners concluded in the report that `` Laith appears to have suffered severe and lasting physical and psychological injuries as a result of his arrest and incarceration at Abu Ghraib prison . '' Another detainee , Youssef , was detained by U.S. soldiers nearly seven years ago when he tried to enter Afghanistan from neighboring Pakistan without a passport , the report says . He initially was held in an Afghan prison , where he describes `` being stripped naked , being intimidated by dogs , being hooded and being thrown against the wall on repeated occasions , '' the report says . A few months later , he was taken to the Guantanamo Bay facility , where he was subjected to interrogators who would enter his cell and force him to lie on the floor with his hands tied behind his back to his feet , the report says . Youssef said the interrogators wanted him to confess of involvement with the Taliban , the report says . Based on its investigation , the report calls on the U.S. government to issue a formal apology to detainees subject to torture and ill treatment by the military since fall 2001 in Afghanistan , Iraq , Guantanamo Bay and elsewhere . The rights group also demands that the Bush administration : . • `` Repudiate all forms of torture and cruel , inhuman or degrading treatment '' ; . • Establish an independent commission to investigate and report publicly the circumstances of detention and interrogation at U.S.-run prisons in Afghanistan , Iraq and Guantanamo Bay ; . • Hold individuals involved in torturing detainees accountable through criminal and civil processes ; and . • Monitor thoroughly the conditions at U.S.-run prisons all over the world . CNN Radio contributed to this report .
Study reveals medical evidence of torture , including beatings and electric shock . Group calls on U.S. government to issue a formal apology to tortured detainees . Rights group presents list of demands to Bush administration .