Oil up; Iran, Saudi supply worries offset U.S. supply growth | Reuters

Oil up; Iran, Saudi supply worries offset U.S. supply growth | Reuters:

Oil prices edged up in cautious trade on Tuesday as expectations of higher U.S. shale output and inventories vied with worries that crude supply from the Middle East could be disrupted by looming U.S. sanctions on Iran and growing tensions with top exporter Saudi Arabia.

U.S. Senator Lindsey Graham accused Saudi Crown Prince Mohammed bin Salman of ordering the murder of Saudi journalist Jamal Khashoggi and said the prince was jeopardizing relations with the United States.

U.S. President Donald Trump said the Saudi crown prince intends to expand an investigation into the disappearance of Khashoggi and that the prince did not know what happened in the Turkish consulate where Khashoggi apparently disappeared.