Brent crude oil prices fell this evening amid worries about details of a euro zone debt bail-out fund, while a larger than expected rise in weekly US crude oil inventories data also affected the market.
Brent was down 44 cents to $106.70 a barrel after falling more than $1 earlier. US crude shed 82 cents to $83.63.
Weekly data from the US Energy Information Administration (EIA) showed a 1.9 million barrel increase in crude oil inventories, indicating weaker demand.
On Tuesday, oil prices jumped more than 3%, bolstered by expectations that European officials would aggressively tackle their debt crisis.
But the plans face opposition in Germany, and there are signs of a split within the currency bloc over the terms of Greece's next bail-out.
In the US, crude oil stocks for the week ending September 23 rose 1.92 million barrels, compared with a forecast for a 800,000 barrel rise.