Oil prices rose on Monday, extending vast gains last week prompted by tensions between Iran and the United States, as Washington was set to announce new sanctions on Tehran.  Brent futures were up 11 cents, or 0.17%, at $65.31 a barrel by 0845 GMT. West Texas Intermediate crude was up 40 cents, or 0.7%, at $57.83 a barrel. Oil prices surged after Iran shot down a drone on Thursday that the United States claimed was in international airspace and Tehran said was over its territory. Brent racked up a gain of about 5% last week, its first weekly gain in five weeks, and WTI jumped about 10%, its biggest weekly percentage gain since December 2016. U.S. President Donald Trump […]