A fuel boss says he expects prices to climb 15 - 20 cents per litre in coming weeks, after new developments in the US - Iran conflict.

Oil prices rose on Monday morning as fighting between the US and Iran intensified, fuelling concerns over disruptions to energy shipments through the Strait of Hormuz.

After weeks of easing fuel costs, average petrol prices in the United States have climbed back to $4 per gallon, driven by the recent flare-up in the Middle East and rising…