Oil prices continued on Monday, falling last weekend as the dollar gained as Brent crude slipped to its lowest level in nearly a month.
Other markets fell after investors were apprehensive over the jobs report in the United States on Friday, which showed the fastest pace of wage increases in more than eight and a half years, fueling expectations of inflation.
This has pushed the dollar higher, putting pressure on oil because of its dollar pricing.
Brent fell 75 cents, or 1.1 percent, to $ 67.83 a barrel at 00:33 GMT after falling 1.5 percent on Friday.
US WTI fell 66 cents to $ 64.79 after falling 0.5 percent in the previous session.