OPEC agreed on Wednesday to reduce its oil output to 32.5 million bpd from the current production levels of around 33.24 million bpd, two OPEC sources told the press.

The producing group will agree concrete levels of production by each country at its next formal meeting in November, the sources said.

One source also said that once production targets were reached, OPEC would reach out to non-OPEC producers for cooperation.

Oil prices rose more than 2 percent in volatile trade on Wednesday after speculation that OPEC members gathered in Algeria to lay the foundation for a production-limiting deal in November.Crude futures had gyrated after a surprise drop in U.S. crude stockpiles for a fourth straight week was offset by a large build in gasoline.Brent crude was up $1.20, or 2.7 percent, to $47.17 a barrel by 12:56 p.m. EDT (1656 GMT). It fell to a session low of $45.70 earlier, slipping into negative territory.U.S. West Texas Intermediate (WTI) crude rose by $1, or 2.2 percent, to $45.67.Full details of the plan may only be available in November, when OPEC's policy meeting in Vienna will be on.U.S. crude inventories fell 1.9 million barrels in the week to Sept. 23, the Energy Information Administration (EIA) reported, surprising analysts who had forecast a build of 3 million barrels, according to a Reuters poll."The report is bullish," said John Kilduff, partner at New York energy hedge fund Again Capital. "Low imports continue to drag down overall crude inventories, defying expectations of a strong rebound."Over the past month, U.S. crude inventories have slumped about 23 million barrels, according to the EIA.But in the latest week, gasoline stocks rose strongly too, building by 2 million barrels, much more than the 178,000-barrel rise forecast in the Reuters poll."With the situation we are in with crude supplies, even though we have seen draws over the last few weeks, we're still well above five-year averages on inventories," said Tariq Zahir, trader at Tyche Capital Advisors in New York."So we expect any strength we see to get sold into and prices to drift to new lows after this as we get to quarter-end this weekend. There could be more pressure if there's no deal from the OPEC talks at Algiers."Crude prices fell 3 percent on Tuesday after Saudi Arabia and Iran, both OPEC majors, dashed hopes that they would find a compromise at the talks towards easing a global oil glut.Iranian Oil Minister Bijan Zanganeh said on Wednesday the Islamic Republic would agree to curb production "at close to 4 million barrels per day". Iran's output has stagnated at 3.6 million bpd since the lifting of Western sanctions.