Oil prices dipped in the international market on Thursday, as US Federal Reserve denied any plans of periodic cuts in the interest rates and US-China trade talks ended without any results. Benchmark Brent crude slipped 1.6%, to $63.99 a barrel. US WTI crude dropped 1.6%, to $57.65/barrel. The US central bank yesterday cut interest rates but rebuffed hopes of a lengthy series of cuts to shore up the economy.