BEIJING/SINGAPORE, March 12 (Reuters) – Oil prices jumped on Thursday as Iran stepped up attacks on oil and transport facilities across the Middle East, raising fears of a prolonged conflict and oil-flow disruptions through the Strait of Hormuz. Brent futures rose $8.54, or 9.28%, to $100.52 a barrel at 0354 GMT, while U.S. West Texas Intermediate crude was up $7.22, or 8.28%,…
