WIKILEAKS is again publishing American military documents in the website's first release of leaked US government secrets in more than a year.

WikiLeaks publisher Julian Assange yesterday announced a progressive release of more than 100 leaked US Defence Department files setting out rules and procedures for interrogating detainees in military custody.

Julian Assange. Credit:Reuters

The documents to be published over the next month include the standard operating procedures of the Guantanamo Bay jail, documents relating to the Abu Ghraib and Camp Bucca prisons in Iraq, and so-called ''fragmentary orders'' setting out changes to detainee procedures across US military operations worldwide.

The classified documents span a decade of counter-terrorism operations, including detail on US military interrogation procedures and a long-standing practice of routinely destroying recordings of interrogations.