US president Donald Trump, who recently called on Opec producers to help reduce oil prices, has raised prices through his tweets, Iranian Opec Governor Hossein Kazempour Ardebili said.

“Your tweets have increased the prices by at least $10. Please stop this method,” the news agency SHANA on Thursday quoted Kazempour Ardebili as saying.

Mr Kazempour Ardebili said Mr Trump was trying to intensify tensions between Iran and Saudi Arabia and he called on the United States to join world powers in a meeting with Iran in Vienna on Friday.

Foreign ministers from the five remaining signatories of a nuclear deal between Tehran and world powers will meet Iranian officials in Vienna to discuss how to keep the accord alive after the US withdrawal from the pact. – Reuters