Law enforcement officials believe that several of the suspects are “gettable,” meaning that they live in a country with which the United States has an extradition treaty, the newspaper said. The case is advancing quickly partly because the attack was not as sophisticated as initially believed, and law enforcement authorities were able to identify at least some suspects early on, the newspaper said. Officials at JPMorgan, the FBI and Bharara’s office were not immediately available for comment outside regular U.S. business hours.