Oil prices were slightly higher on Tuesday as energy market participants closely monitored the potential for fresh talks between the U.S. and Iran in Qatar. International benchmark Brent crude futures with August delivery were last seen up 0.2% at $73.32 per barrel, erasing earlier losses. The contract, however, is on track to end June roughly $19 lower, or 20% lower than the closing session on May 29. Brent crude futures with September delivery , meanwhile, rose 0.5% at $74.29. U.S. West Texas