An early assessment by U.S. authorities has suggested Iran was behind the attack on tankers off the UAE coast at the port of Fujairah, which Saudi Arabia said had damaged two Saudi vessels, the Wall Street Journal reports, quoting a government official. Yesterday, Saudi reports about the attack, which Riyadh called a sabotage, pushed oil higher as even the slightest indication that tensions may be flaring up in the Middle East, doing its usual job of putting upward pressure on oil benchmarks. However, neither Saudi Arabia nor the UAE said who was…