WASHINGTON: Saddam Hussein believed Iran was a significant threat to Iraq and left open the possibility that he had weapons of mass destruction rather than appear vulnerable, according to declassified FBI documents on interrogations of the former Iraqi leader.

"Hussein believed that Iraq could not appear weak to its enemies, especially Iran," FBI special agent George Piro wrote on notes of a conversation with Saddam in June 2004 about weapons of mass destruction (WMD).

He believed Iraq was being threatened by others in the region and must appear able to defend itself, the report said.