(Changes percentage increase in para 2)
LONDON, Oct 30 (Reuters) - Barclays Plc has setaside 500 million pounds ($799 million) to cover potential finesfor manipulating currency markets, taking the shine off a risein third quarter profits as it cut costs.
The British bank on Thursday reported an underlying pretaxprofit in the three months to the end of September of 1.59billion pounds, up 15 percent from 1.39 billion pounds a yearbefore.
It said it set aside 500 million pounds "relating to ongoinginvestigations into foreign exchange with certain regulatoryauthorities". It is one of six banks that is in talks with UKregulators about a coordinated settlement over allegedmanipulation of foreign exchange markets, sources have said.(1 US dollar = 0.6259 British pound) (Reporting by Steve Slater; Editing by Matt Scuffham)