The American Defence Secretary Robert Gates has called in the FBI to help in the investigation on who recently leaked 90,000 classified military documents on the war in Afghanistan. The leaks were posted online earlier this week. From Washington, Iain MacKenzie reports.

Robert Gates claimed the leaking of 90,000 classified military files had potentially severe and dangerous consequences for troops on the ground.

He said the documents relating to battlefield incidents and intelligence gathering could also pose a threat to those Afghan nationals assisting the coalition. However, the most stark warning came from the Chairman of the Joint Chiefs appearing alongside him - Admiral Mike Mullen said Wikileaks may already have blood on its hands.