No headlines driving this as far as I can see but the dollar has taken a turn for the worst versus the majors.
USD/JPY is back below the 78.00, as low as 77.95 so far. Overnight lows at 77.88 is next support.
EUR/USD is testing the important area of resistance in the high 1.45-teens while USD/CHF sinks toward 0.8000 again.