JP Morgan and FBI probe cyber attacks on big finance firms
JP Morgan Chase is investigating a possible cyber attack and working with law enforcement authorities to determine the scope.
The bank is taking additional steps to safeguard sensitive or confidential information, though it did not see unusual fraud activity at this time, company spokeswoman Trish Wexler said.
JP Morgan disclosed the investigation after the FBI said on Wednesday that it was investigating media reports that several US financial companies 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.
Mr Campbell did not name any companies or give more details, although media reports had named JP Morgan as one victim of the attacks.
Other potential victims have yet to be named.
JP Morgan launched its investigation after malicious software was recently discovered in the bank's network, signaling it was the victim of a cyber attack, sources said.
The bank has yet to determine the severity.
The New York Times said that the attackers stole large quantities of data, including bank account information, though their motivation was not yet clear.
Several private security firms were hired to conduct forensic reviews, it added.