Brent crude futures was down $3.39, or 4.1%, to $79.06 a barrel by 1412 GMT. U.S. West Texas Intermediate (WTI) crude futures were down $3.26, or 4.2%, to $74.51. OPEC+ delayed its ministerial meeting to Nov. 30 from Nov. 26 as previously scheduled, OPEC said in a statement, a surprise development that gave no reason for the postponement.