Signs of faltering demand have also prompted weakening sentiment, dropping prices to levels comparable to when the output cuts were first announced late past year.
On the New York Mercantile Exchange crude futures for August delivery dipped 0.21% to $43.42 a barrel, while on London's Intercontinental Exchange, Brent eased 0.26% to $45.90 a barrel.
The U.S. crude futures contract for July CLc1, due to expire later on Tuesday, fell $1.27 to $42.93, its lowest since November 14, before recovering to around $43.10.
Oil prices steadied near seven-month lows on Tuesday.
Brent was trading 26 cents down at $45.76 per barrel, while US West Texas Intermediate dropped 20 cents to $43.31.
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Su-35 and Su-34 jets were used in the strike, which was preceded by drone reconnaissance flights, the ministry said. The strikes targeted a meeting of high-ranking Islamic State chiefs where Al- Baghdadi was reportedly present.
Oil has slid 20 percent in the first half of 2017, a period when prices have tended to rise.
Despite the oil production cuts agreed on by members and non-members of the Organisation of Petroleum Exporting Countries (OPEC), the International Energy Agency (IEA) predicts that the output of non-OPEC members will outpace demand in 2018.
Libya is exempt from the current OEPC and top non-OPEC producer deal to remove 1.8 million barrels of crude per day from the market to help boost oil prices.
"There is this bearish sentiment building into the market over what's happening in the U.S. There's a lot of concern the U.S. could offset OPEC's production cuts", said Jenna Delaney, senior oil analyst at S&P Global Platts.
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Everson emphasized that Facebook invented the Feed format, which is now used by Instagram and other competitors. She said, "We think Stories is also another format that not only consumers but advertisers use".
Ahead of weekly US inventory reports, USA crude oil stocks were forecast to have fallen for the second straight week, while gasoline supplies were seen unchanged after last week's data showed an unexpected build that weighed down the market.
OPEC's strategy of flooding the world with excess oil caused crude to crash as low as $26 a barrel in February 2016. MarketWatch reports that the price retreat puts US crude in bear-market territory, defined as a drop of at least 20% from a recent peak. That means they cut output by more than they were required to do.
Hence, barring a "substantial" decline in the U.S. oil rig count or United States shale production "rolling over", OPEC would need to continue its current quota for all of 2018 to keep inventories from rising or "much deeper" cuts to push them back to their five-year average.
"A lot of faith and hope and belief was put into" the OPEC-led output deal, Kilduff said.
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The report said a complete analysis with probable cause and recommendations related to the crash will be issued "at a later date". The National Transportation Safety Board released 500 pages of findings on the death of driver Joshua Brown , 40.