Oil fell below $59 a barrel on yesterday as traders doubted all OPEC members would follow Saudi Arabia?s lead to curb output under an agreement reached last week.
U.S. crude eased 71 cents to $58.62 a barrel by 14:28 GMT.
The front month contract lost $1.68, more than 2 percent, on Friday to hit its lowest level this year.
London Brent crude dropped 57 cents to $59.11.
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Oil Slid Form 2week High
Oil fell below $59 a barrel on yesterday as traders doubted all OPEC members