A representativefor Paramount Pictures Australia has apologized for tweeting a poster promoting a Sept. 11 premiere of "Teenage Mutant Ninja Turtles" by showing the heroes falling from an exploding building. "We are deeply sorry to have used that artwork for the marketing materials promoting the September 11 opening in Australia," the representative told TMZ.com Tuesday. "Combining that image and date was a mistake. We intended no offense and have taken immediate action to discontinue its use." The movies opens Aug. 8 in the United States.