The FBI said it is investigating media reports that several U.S. financial firms have been victims of recent cyber attacks. “We are working with the United States Secret Service to determine the scope of recently reported cyber attacks against several American financial institutions,” FBI spokesman Joshua Campbell said in a statement late on Wednesday. He did not name any firms or give further details. A Secret Service spokesman could not be reached for comment. JPMorgan Chase & Co was the victim of a recent cyber attack, according to two people familiar with the incident who asked not to be identified because they were not authorized to speak publicly about the matter. They declined to elaborate on the severity of the incident, saying JPMorgan was still conducting an investigation to determine what happened.