NEW YORK (REUTERS) - Illinois Attorney-General Lisa Madigan is investigating the security breach at JPMorgan Chase, according to a spokeswoman.

Connecticut Attorney-General George Jepsen also is probing the hacking incident, Reuters reported earlier.

Other attorneys-general offices are "very concerned," and sharing information, said William Brauch, director of the Iowa Department of Justice's Consumer Protection Division.

News of the actions comes a day after the No. 1 US bank by assets revealed 83 million customer records were exposed when its computer systems were compromised by hackers.