The United States has evidence that the Pakistani Taliban was behind the failed attempt to detonate a car bomb in the heart of New York City, US Attorney General Eric Holder said Sunday. "We've now developed evidence that shows that the Pakistani Taliban was behind the attack," Holder said on ABC television's Sunday current affairs talk show "This Week." "We know that they helped facilitate it. We know that they probably helped finance it, and that he was working at their direction," he said. Faisal Shahzad, a Pakistani born US citizen, was pulled off a plane to Dubai and arrested Monday for allegedly leaving a sport utility vehicle rigged to explode in New York's Times Square just over a week ago. Holder's comments came as the New York Times reported that the United States warned Pakistan it must crack down on Islamic extremists or face severe consequences.