He said that researches, prepared by his medical team, prove that U.S. occupation forces used internationally prohibited substances, including mustard gas, nerve gas, and other burning chemicals in their attacks in the war-torn city.

The health official announced his findings at a news conference in the health ministry building in Baghdad.

The press conference was attended by more than 20 Iraqi and foreign media networks, including the Iraqi ash-Sharqiyah TV network, the Iraqi as-Sabah newspaper, the U.S. Washington Post and the Knight-Ridder service.

Dr. ash-Shaykhli started the conference by reporting the current health conditions of the Fallujah residents. He said that the city is still suffering from the effects of chemical substances and other types of weapons that cause serious diseases over the long term.

Asked whether limited nuclear weapons were also used by U.S. forces in Fallujah, Dr. ash-Shaykhli said; “What I saw during our research in Fallujah leads me to me believe everything that has been said about that battle.

“I absolutely do not exclude their use of nuclear and chemical substances, since all forms of nature were wiped out in that city. I can even say that we found dozens, if not hundreds, of stray dogs, cats, and birds that had perished as a result of those gasses.”

Dr. ash-Shaykhli promised to send the findings of the researches to responsible bodies inside Iraq and abroad.

Fallujah residents said napalm gas was used

During the U.S. offensive, Fallujah residents reported that they saw “melted” bodies in the city, which suggests that U.S. forces used napalm gas, a poisonous cocktail of polystyrene and jet fuel that makes the human body melt.

In November, Labour MPs in the UK demanded Prime Minister Tony Blair to confront the Commons over the use of napalm gas in Fallujah.

Furious critics have also demanded that Blair threatens the U.S. to pullout British forces from Iraq unless the U.S. stops using the world’s deadliest weapon.

The United Nations banned the use of the napalm gas against civilians in 1980 after pictures of a naked wounded girl in Vietnam shocked the world.

The United States, which didn't endorse the convention, is the only nation in the world still using the deadly weapon.