US PRESIDENT Donald Trump said on Saturday that he had received assurances from King Salman of Saudi Arabia that the kingdom will increase oil production, “maybe up to 2,000,000 barrels” in response to turmoil in Iran and Venezuela.

Saudi Arabia acknowledged the call took place, but mentioned no production targets.

Mr Trump wrote on Twitter that he had asked the king in a phone call to increase oil production.

Just spoke to King Salman of Saudi Arabia and explained to him that, because of the turmoil & disfunction in Iran and Venezuela, I am asking that Saudi Arabia increase oil production, maybe up to 2,000,000 barrels, to make up the difference...Prices to high! He has agreed! — Donald J. Trump (@realDonaldTrump) June 30, 2018

A little over an hour later, the state-run Saudi Press Agency acknowledged the call, but offered few details.

“During the call, the two leaders stressed the need to make efforts to maintain the stability of oil markets and the growth of the global economy,” the statement said.

It added that there also was an understanding that oil-producing countries would need “to compensate for any potential shortage of supplies.”

It did not elaborate.

Oil prices have edged higher as the Trump administration has pushed US allies to end all purchases of oil from Iran.

Oil prices also have risen with the ongoing unrest in Venezuela, as well as with fighting in Libya over control of that country’s oil infrastructure.

Saudi Arabia currently produces some 10 million barrels of crude oil a day.

Its all-time record is 10.72 million barrels a day.

Last week, members of the Organisation of the Petroleum Exporting Countries (OPEC) cartel led by Saudi Arabia agreed to pump 1 million barrels more crude oil per day, a move that should help contain the recent rise in global energy prices.

However, summer months in the US usually lead to increased demand for oil, pushing up the price of gasoline in a midterm election year.

Mr Trump’s tweet offered no time frame for the additional 2 million barrels — whether that meant per day or per month.

The Trump administration has been counting on Saudi Arabia and other OPEC members to supply enough oil to offset the lost Iranian exports and prevent oil prices from rising sharply.

The administration has threatened close allies such as South Korea with sanctions if they don’t cut off Iranian imports by early November.

South Korea accounted for 14 per cent of Iran’s oil exports last year, according to the US Energy Department.

China is the largest importer of Iranian oil with 24 per cent, followed by India with 18 per cent. Turkey stood at 9 per cent and Italy at 7 per cent.

The State Department has said it expects the “vast majority” of countries will comply with the US request.

Mr Trump announced in May that he would reimpose sanctions on Tehran.

Previously, the administration said only that other countries should make a “significant reduction” in imports of Iranian crude to avoid US sanctions.

Mr Trump has repeatedly lashed out at OPEC on Twitter in recent months, piling pressure on Riyadh, a major ally, to boost output as he hopes for lower pump prices before midterm congressional elections in November.

His latest comments come a week after ministers from OPEC — of which Saudi Arabia is the major member — had already agreed to raise output from July.

Iran has accused Mr Trump of trying to politicise OPEC and said it was US sanctions on Iran and Venezuela that had helped push up prices.