Moscow's vow to continue Syrian air strikes to punish bombers of a Russian jet also heightened geopolitical risk over the Middle East, some traders said.
1. Earlier in the session, a broader commodities sell off led by copper and firmer dollar had weighed on oil.
2. Saudi Arabia says it is ready to work with other oil producing and exporting countries to stabilize prices.
Despite similar pledges in the past, the Saudis and other big OPEC producers have kept output high to maintain market share and crude prices have dropped 50 percent over the past year.
4. Benchmark Brent futures were up 54 cents, or 1.2 percent, at USD 45.20 a barrel.
5. U.S. crude's West Texas Intermediate (WTI) futures  rose 17 cents, or 0.4 percent, to USD 42.07 a barrel.

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