Oil prices increased on Wednesday over an unexpected decline in US crude oil inventories, while concerns over the safety of vaccines continue to cap prices. International benchmark Brent crude was trading at $68.72 per barrel at 0652 GMT for a 0.48% increase after closing Tuesday at $68.39 a barrel. American benchmark West Texas Intermediate (WTI) was at $65.21 per barrel at the same time for a 0.63% rise after it ...