"We are not getting any oil from Iran now," said the Turkey's official, who spoke on condition of anonymity. "We were one of the eight countries getting an exception from those sanctions, and now we are ready to abide by them," he said.

Russia removes contaminated oil from an export pipeline Druzhba

Brent crude futures were at $70.36 per barrel, down 63 cents, or 0.9%, from their last close. U.S. West Texas Intermediate (WTI) crude futures were down by 51 cents, or 0.8%, at $60.91 per barrel.

NPD - Preliminary production figures for April 2019 show an average daily production of 1 729 000 barrels of oil, NGL and condensate, which is a decrease of 24 000 barrels per day compared to March.

Brent crude futures were down 39 cents, or 0.5 percent, at $71.79 at barrel. WTI crude futures for July delivery were down 59 cents, or 0.9 percent, at $62.54.

Brent crude futures, the international benchmark for oil prices, were at $72.31 per barrel at 1030 GMT, up 34 cents, or 0.5 percent, from their last close. U.S. West Texas Intermediate (WTI) crude futures were up 42 cents, or 0.7 percent, at $63.52 per barrel.

Following its 14th Meeting, which took place on 19 May 2019, in Jeddah, the Kingdom of Saudi Arabia, the Joint Ministerial Monitoring Committee (JMMC) has reaffirmed its commitment to achieving a balanced market and working towards oil market stability on a sustainable basis with solid fundamentals.

"We want to bring inventories down to a more normal levels," Falih said. "We need to stay the course and do that in the weeks and months to come."

Russia sees a range of options that would allow OPEC+ to continue output cooperation until year-end, from easing the limits to ending the extreme throttling-back that has seen some countries exceed original cutback targets.

"Work to increase production to full capacity will continue, and in early June Kashagan should reach production levels of 370,000-400,000 b/d due to the work carried out during the maintenance," it said.