A published report says the United States has ended its hunt for biological, chemical and nuclear weapons in Iraq, several months after inspectors concluded that Baghdad did not possess banned weapons at the time of the U.S.-led invasion.

The Washington Post reports Wednesday that chief U.S. weapons inspector Charles Duelfer wrapped up his work in Iraq last month.  The newspaper quotes unnamed intelligence officials as saying the hunt was called off because of a lack of new information and the ongoing violence in Iraq.

One official said there will not be any substantial changes to Mr. Duelfer's final report, which was presented to Congress last September.  The report concluded that former Iraqi leader Saddam Hussein did not posses illicit weapons prior to the 2002 invasion.

President Bush cited Iraq's alleged stockpiles of banned weapons as a key reason for going to war.