The FBI has launched a criminal probe of 14 companies as part of a larger investigation in the wake of the subprime mortgage and resultant credit crisis, according to The Wall Street Journal. Citing the head of the FBI's economic crimes bureau in Washington, D.C., the Journal said the probe would look at possible accounting fraud, loan securitization and insider trading. The investigation will look at all stages of the securitization process, from companies that bundled loans to those that ultimately held them, the paper said. The FBI declined to identify any of the 14 companies, the Journal said. The Securities and Exchange Commission and several state regulators, including New York Attorney General Andrew Cuomo, have pressed Wall Street firms amid the housing bubble's burst and resulting mortgage meltdown over their involvement in the process of originating, packaging and selling loans.