The dollar slipped to a four-week low against the yen on Friday, after a newspaper report of possible Russian interference in the US election.
The report overshadowed any support for the dollar from the approval of a tax-reform bill in the US House of Representatives on Thursday, which had been a key focus for markets.
The greenback slipped more than half a per cent to as low as 112.395 yen, its weakest since Oct. 19.
The dollar was down 0.3 per cent at 93.700 against a basket of six major currencies, according to Reuters report.
The euro rose 0.2 per cent to $1.1794.
Bitcoin hit another all-time high just shy of $8,000, with analysts saying a software upgrade that had been suspended but might now take place later on Friday was behind the move higher.