After confirming earlier this week that hackers did indeed infiltrate its corporate network and compromise user passwords, eBay is facing heat on all fronts – from both state governments across the U.S., and from data protection authorities in Britain and the European Union.

Attorneys General in Connecticut, Florida and Illinois announced Thursday they were launching a joint investigation into the security breach.

“The magnitude of the reported eBay data breach could be of historic proportions, and my office is part of a group of other attorneys general in the country investigating the matter,” said Florida Attorney General Pam Bondi in a statement. “We must do everything in our power to protect consumers’ personal information.”

The office of Connecticut Attorney General George Jepsen noted in a press release that eBay has approximately 660,000 active users in Connecticut, though it is not clear how many may be impacted by the breach.

“My office will be looking into the circumstances surrounding this breach as well as the steps eBay is taking to prevent any future incidents,” said Jepsen.

While not part of the group jointly investigating eBay, New York Attorney General Eric T. Schneiderman called on the online auction site to provide free credit monitoring to customers impacted by the cyber attack.

Meanwhile, CNET reports that across the pond, UK Information Commissioner Christopher Graham is considering a formal probe into the eBay breach. Graham’s office made waves in 2011, when it fined Sony £250,000 (currently $421,000) for its PlayStation network hacking, according to the Register. But the UK investigation may be on hold until Data Protection authorities in Luxembourg, home of eBay’s European headquarters, fully investigate the matter themselves.