Dollar drifts higher as traders eye Iran talks ahead of US jobs data

TOKYO, Aug 7 : The dollar drifted higher against the yen and euro on Friday, building on the previous day's gains as doubts about an Iran peace deal buffed the U.S. currency's appeal as a haven.The greenback also drew support from higher Treasury yields after a Financial Times report citing sources close to Federal Reserve Chair Kevin Warsh pointed to the potential for a September interest rate hike, depending on incoming data.The monthly U.S. payrolls report, due later on Friday, could provide more clues on the Fed's rate path.The dollar rose slightly to 158.505 yen in the Asian morning, after gaining 0.4 per cent on Thursday, putting it on course to rise around 0.7 per cent this week as it recovered from a bout of joint Japan-U.S. intervention that sent the U.S. currency tumbling from ne