Quoting a person familiar with the matter, the newspaper said that the director of sales at Deutsche Bank in London was placed on leave last month after the German bank found what it regarded to be inappropriate communication between her and the central bank of Singapore.
Responding to the report, a Deutsche Bank spokeswoman said: "Deutsche Bank has received requests for information from regulatory authorities that are investigating trading in the foreign exchange market.
"The bank is cooperating with those investigations, and will take disciplinary action with regards to individuals if merited."
According to German media reports in January, Deutsche Bank, one of the biggest currency traders in the world, already suspended "at least one" currency trader -- based in New York and trading in Argentine pesos -- on suspicion of possible rigging of forex reference rates.