Reuters reports that the attempted manipulation took place in January and one trader was suspended in February, a spokesman for the bank said. Following an internal probe, a second trader was suspended in May, the spokesman said.
The bank has discovered no evidence of any other attempts at the bank to manipulate currency prices, he said.
The News agency also reports that Barclays' head of spot gold trading is leaving as part of the bank's restructuring and its exit from the commodity business, sources familiar with the situation told Reuters on Tuesday.
Marc Booker's exit leaves Martyn Whitehead, Barclays' global head of metals and mining sales, as the bank's only representative listed with the London Gold Market Fixing company.