U.S. crude slumps 4 percent on stronger dollar, glut warning

Oil prices fell on Friday, with U.S. crude down nearly 4 percent and headed for its worst week in three months, on a renewed rally in the dollar and warnings of an oil glut by the global energy watchdog. Benchmark Brent crude fell more than 2 percent on the day and was on track to its sharpest weekly decline in two months as a weaker U.S. stock market applied further pressure on oil. Data from oil services firm Baker Hughes showing a four-year low in the number of rigs drilling for oil in the Un