Oil prices fell on Tuesday ahead of the meeting of the Organisation of Petroleum Exporting Countries (OPEC) and its allies, known as OPEC+. 

Brent crude plunged 0.37 percent to $99.66 a barrel, while West Texas
Intermediate crude fell 0.01 percent to $93.88 a barrel.

The OPEC+ meeting, scheduled to hold on Wednesday, will decide the volume of oil output for September. 

According to a urvey, two of eight OPEC+ sources said there would be a modest increase for September – others said output is likely to remain

The organisation had approved the plans to add 648,000 barrels of oil per day for August.