NEW YORK — Oil prices jumped about 4 percent to a one-week high on Tuesday as a resumption in fighting between the U.S. and Iran renewed fears of supply disruptions from the Middle East. Brent futures rose $3.44, or 3.8 percent, to $93.93 a barrel at 1:10 p.m. EDT (1710 GMT), while U.S. West Texas Intermediate crude rose $3.72, or 4.3 percent, to $89.48. That puts Brent on track for its highest close since August 20 and WTI on track for its highest close since July 23. The U.S. launched new air strikes on Iranian targets on Tuesday, quashing hopes that an exchange of fire last weekend might not presage a wider renewal of hostilities. Oil prices had already risen after that first exchange of direct attacks since July and after reports of two tankers being hit leaving the Strait, the global oil supply waterway that Iran has effectively closed to shipping. Tehran remained defiant, warning that it would prevent oil being exported from the Gulf, despite a threat by U.S. President Donald Trump to hit Iran "hard" in response to the renewed Iranian strikes, and a warning from U.S. Treasury Secr