NEW YORK - U.S. investigators are probing any Pakistani Taliban involvement in the failed New York bombing based on information on the main suspect, an official said Thursday, the day John F. Kennedy International Airport saw another high drama. The suspect in the Times Square bombing attempt, Faisal Shahzad, 30, a Pakistan-born U.S. citizen, has admitted to his involvement in the incident, The Washington Post reported, quoting authorities who arrested him Monday at the same airport. Three days after Shahzad was pulled off an Emirates Airlines' flight, US authorities detained two passengers aboard another Emirates airlines plane after spotting a name similar to one on the "no-fly" list, then released them after it was determined it was a false match. Meanwhile, US Attorney General Eric Holder said Thursday that Shahzad's cooperation with federal agents is continuing. "We will continue to pursue a number of leads as we gather intelligence relating to this attempted attack," Holder told a Senate appropriations subcommittee hearing in Washington. The questioning of Shahzad by federal agents is "ongoing" and "there is simply no higher priority than disrupting potential attacks and bringing those who plot them to justice," the attorney general said. Holder said Shahzad has provided "useful information." The bomb plot coverage dominate the news media, which is calling Pakistan as the breeding ground for terrorists, with the Indian-Americans making similar statements to create a wedge between Washington and Islamabad. The Washington Post report quoted the FBI as saying Shahzad admitted to its agents that he received bomb-making training in Pakistan. These details besides a number of telephone calls he reportedly received from Pakistan prior to Saturday's attempting bombing have prompted authorities to look into the Pakistani Taliban connection, a federal law enforcement official told the Post. "It's a leading line of inquiry," the official said. "There are only a few organizations in Pakistan that could provide training, and the Pakistani Taliban is one that has an ax to grind with us." The militant group's earlier claim of responsibility is being looked at again, the report said, adding the probe only raises more concerns as the Pakistani Taliban was previously thought of as not being interested in launching attacks outside the country. The New York incident also has revived questions about the attempted bombing of a Detroit-bound jetliner on Christmas Day, the report said. A controversy about that incident centered on whether the suspect should have been placed in a military court instead of a civilian court. "Like the Christmas Day bomber, we were lucky that both of these folks were incompetent -- they couldn't trigger the explosives," Senator Christopher Bond, a Republican, was quoted as saying. There were these other developments in the terror probe: * Shahzad's father said he wants to know the truth. Air Vice Marshal Baharul Haq, the former Pakistan Air Force Commander, told Britains Sun newspaper in Peshawar, How can I appeal for his release if hes really involved in the terror plan? I need to see what happens and then I will contact the government. I dont know the truth, but Im not sure hes doing all this. This at least is what I know. We are liberal people. * Phone records reveal Shahzad called a white supremacist near Philadelphia in early April, sources said. Details of their discussion were not immediately clear. * Authorities said the Kel-Tec weapon found in the car Shahzad left at Kennedy Airport was legally purchased by Shahzad about two months ago after hed just passed a 14-day background check at a gun shop in his former hometown of Shelton, Conn. * A photo unearthed yesterday shows Shahzad, his wife, Huma Mian, and a group of friends standing in Times Square more than a year ago within 100 yards of where he would leave the intended car bomb. * A source told The New York Post that Shahzad made a dry run the night before the failed attack, laying out a route to the scene and leaving a getaway car for his escape.