Oil prices fell on Wednesday after a report showed a rise in U.S. crude inventories, but global markets remained tense amid an intensifying political crisis in Venezuela, tightening U.S. sanctions on Iran, and ongoing OPEC supply cuts.  Brent crude oil futures were at $71.52 per barrel at 0652 GMT, down 54 cents, or 0.8 percent, from their last close. U.S. West Texas Intermediate (WTI) crude futures were down 66 cents, or 1 percent, at $63.25 per barrel. Trading was thin as May 1 is a holiday in many markets. U.S. crude stocks rose by 6.8 million barrels to 466.4 million barrels in the week to April 26, industry group the American Petroleum Institute (API) said on Tuesday. “Crude prices are off … after the weekly API oil […]