Singapore's central bank has been in contact with foreign regulators and stands ready to assist with investigations into foreign exchange rigging at several major banks.
" We have been in touch with financial institutions, including Deutsche Bank, on these investigations," the Monetary Authority of Singapore said in a statement on Thursday.
"MAS is looking into all allegations of inappropriate behaviour."
MAS' statement came after a Wall Street Journal report said that Deutsche Bank had put a London-based currency saleswoman on leave last month for "inappropriate communication" with the MAS.
The report said the saleswoman was named Kai Lew, but did not have any details about her communication with the Singapore regulator.
Deutsche Bank itself has not disclosed any details, saying in a statement that it "will take disciplinary action with regards to individuals if merited."