President Barack Obama has called for the closure of Guantanamo by the end of the year. More than 200 detainees remain locked up there.

Attorney General Eric Holder Monday appointed prosecutor John Durham to lead the review of cases of CIA interrogators who allegedly abused the detainees.

The Wall Street Journal reported Tuesday that Durham was already examining the destruction of 92 videotapes of CIA interrogations, which was part of the investigation launched by former president George W. Bush in 2008 when the CIA was accused of torturing terrorism suspects.

Pillay also called for curbing the use of US-run secret detention centres. 'Secrecy has been a major part of the problem with this type of detention regime.'