Blix, who repeatedly disputed US claims that Saddam Hussein  had chemical and biological weapons, told the Australian national radio that the deposed Iraqi ruler possibly pretended to have an arsenal only as a deterrent.

"I am certainly more and more to the conclusion that Iraq has, as they maintained, destroyed all almost of what they had in the summer of 1991," Blix said.

Asked if it is likely that Iraq has not had weapons of mass destruction for at least 10 years, Blix said it could be right.

"You see, if they didn’t have anything after 1991, there must be some explanation why they behaved as they did. They certainly gave the impression that they were denying access and so forth," he said.

"I mean, you can put up a sign on your door, Beware of the Dog, without having a dog"

Hans Blix 
Ex UN chief weapons' inspector

"I mean, you can put up a sign on your door, Beware of the Dog, without having a dog," Blix said

Blix's latest comments are sure to fuel further the controversy over Iraqi WMD.

Though the US and its allies invaded Iraq on the pretext that it had chemical and biological weapons, nothing has been found even months after the war ended.