Oil prices dipped on Tuesday as supply concerns eased with the resumption of loadings at a Russian export hub, briefly halted by a Ukrainian drone and missile strike, while traders continued to assess the impact of Western sanctions on Russian flows. Brent crude futures were down 28 cents, or 0.4 per cent, at $63.92 a barrel, as of 0100 GMT. U.S. West Texas Intermediate (WTI) crude futures were down 26 cents, or 0.4 per cent, at $59.65 a barrel. Russia's Novorossiysk port resumed oil loadings