LONDON : World oil prices rebounded sharply on Thursday as concerns over supply disruptions in Iran and Nigeria outweighed data showing weak US energy demand, analysts said. New York's main contract, West Texas Intermediate crude for delivery in February, jumped $1.14 to $102.01 a barrel. Brent North Sea crude for February gained $1.36 to $113.60 in London late morning deals. "The US/European-led sanctions on Iran look to tighten and have caused some Asian buyers to begin to look to alternative supplies," said Sanjeev Gupta.