JPMorgan

 The scope of yesterday's computer attack against JPMorgan Chase and at least one other bank appears to be much larger than initially reported.

In addition to possibly affecting seven financial organizations, instead of two as originally reported, some bank records at JPMorgan were altered and possibly deleted, reported CNN, citing unnamed sources. The source of the attacks is not yet known.

Customers of JPMorgan Chase reported seeing zero balances in their accounts both online and on mobile, and speculated that the bank's systems had been hacked into.

The bank however clarified late Monday that it was having a technology problem regarding customers' balance information that it was working to resolve.