An investigation into attempted foreign-exchange market manipulation has found evidence of more potential malfeasance, according to a report from Dow Jones.
These new findings have sparked firings at several major banks and even drawn new firms into the investigation, the wire reported. Six banks paid $4.3 billion last year to settle more narrow probes into foreign exchange, according to Dow Jones.
Read MoreForex manipulation: How it worked
Both JP Morgan and Citigroup—which have already made settlements related to the forex investigations—have recently fired or suspended workers in part because of the probe, Dow Jones reported, citing sources familiar with the matter.
The wire also reported that investigators may be newly examining UBS's wealth-management business—the probe had previously been focused on traders and investment banking salespeople.