This wouldn't be the first time an Iraqi official made an unsubstantiated claim which may turn out to be false; but, here is what he is claiming:

"Soldiers from the Iraqi National Guard found a chemical laboratory that was used to prepare deadly explosives and poisons," Minister of State Kassim Daoud told a news conference.

"They also found in the lab booklets and instructions on how to make bombs and poisons. They even talked about the production of anthrax." Source

Apparently the Marines came out recently discussing the finding of a chemical weapons lab in Falluja; however the marines stated that there was no indication the lab was used to produce chemical weapons. At this point it is unclear whether Kassim Daoud was referring to the same facility or possibly a different facility in Falluja.

More on this story:
Iraqi forces find suspected chemical weapons lab:

Iraq's interim National Security Adviser Kasim Dawood announced the discovery of the suspected chemical weapons lab which he said was "manufacturing death, intoxication and assassination."

Falluja Rebels Had Enough Arms to Rule Iraq -U.S.

But West showed a photographs (sic) of a banner from Zarqawi's followers in a building with a chemical laboratory.

West said there was no indication that the lab was used to produce chemical weapons, but evidence showed they were making explosives and holding bomb-making classes in Falluja, 32 miles west of Baghdad.

More on Iraq WMDs: WMDs In Iraq