Vienna - OPEC oil fell below 100 dollars for the first time since late March on Tuesday, with one barrel standing at 98.49 dollars, 2.59 dollars less than the previous day's 101.08 dollars.

OPEC's latest price announcement came before its decision early on Wedensday to cut overproduction. OPEC calculates an average basket price based on 13 brands produced by cartel members. (dpa)