Oil prices edged higher in Asian trade on Monday. According to the analysts, the increase was seen as major crude producer Iran and Western powers failed to reach agreement over Tehran s nuclear programme. Markets were also supported by signs Greeks would elect a pro-austerity government in upcoming polls, easing concerns the debt-wracked country would exit the eurozone and trigger a global economic crisis. New York s main contract, West Texas Intermediate crude for delivery in July was up 84 cents to $91.70 per barrel while Brent North Sea crude for July gained 55 cents to $107.38 in morning trade. "The Iranian stand-off looks likely it will remain difficult to break down," said Justin Harper, market strategist at IG Markets Singapore. On Saturday the head of Iran s Atomic Energy Organisation said Tehran had "no reason" to suspend its enrichment of uranium to 20 percent. The issue of Tehran s uranium enrichment and stockpile had been at the centre of talks last we...