Hundreds of chemical weapons found in Iraq: US intelligence

A Pentagon official who confirmed the findings said that all the weapons were pre-1991 vintage munitions "in such a degraded state they couldn't be used for what they are designed for."

The official, who asked not to be identified, said most were 155 millimeter artillery projectiles with mustard gas or sarin of varying degrees of potency.

"We're destroying them where we find them in the normal manner," the official said.

In 2004, the US army said it had found a shell containing sarin gas and another shell containing mustard gas, and a Pentagon official said at the time the discovery showed there were likely more.