Brent crude oil futures briefly slipped below $109 on Thursday, pressured by a higher dollar, boosted by worries about escalating turmoil in Ukraine.
The tensions there kept the dollar at two-week highs, weighing on dollar-denominated commodities such as oil.
Brent crude was down 48 cents at $109.04 a barrel by 1415 GMT, recovering from an intraday low of $108.80. It settled almost unchanged overnight.
U.S. oil was up 4 cents to $102.63 a barrel, after ending 76 cents higher the previous session.
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