FRANKFURT (Reuters) - Deutsche Bank (>> Deutsche Bank AG) has suspended at least one currency trader on suspicion of manipulating benchmark forex rates, a German paper reported.

German daily Die Welt, citing people familiar with the investigations, said the trader worked in New York and traded Argentine pesos.

According to sources at the bank, emails were found that led to suspicion that rates had possibly been manipulated, the paper said in a story published in its Wednesday edition. There are indications there may be further cases of possible manipulation, Die Welt added.

Deutsche Bank said it would not comment on individuals. In a statement, it said it was cooperating with investigations and would take disciplinary measures with regard to individuals if merited.

Last year, Britain's Financial Conduct Authority began a formal investigation into possible manipulation in the $5.3 trillion-a-day global FX market. The U.S. Justice Department is also engaged in an active investigation of possible manipulation of the market, the world's largest.

Benchmark foreign exchange rates, often referred to as fixes, are a cornerstone of global financial markets, used to price trillions of dollars worth of investments and deals and relied upon by companies, investors and central banks.

Deutsche Bank, Citigroup (>> Citigroup Inc), UBS (>> UBS AG), Barclays (>> Barclays PLC) and Royal Bank of Scotland (>> Royal Bank of Scotland Group plc) have all said they were cooperating with regulators scrutinizing the market. Citigroup, RBS, JP Morgan (>> JPMorgan Chase & Co.) and Standard Chartered (>> Standard Chartered PLC) have put currency traders on leave.

(Reporting by Victoria Bryan, Thomas Atkins and Paritosh Bansal)