At the same time, the dollar is being pushed higher after unexpectedly strong US jobs figures, which, according to analysts, erase the likelihood of the Federal Reserve (Fed) cutting interest rates this year.
Sunday's Iranian missile attacks follow Israeli attacks on Iran-backed Hezbollah in Lebanon.
Before Israel and the US launched their bombing campaign against Iran on February 28, the price of oil was around $70 per barrel. But the war with Iran has effectively cut off the shipping lane for oil and gas through the Strait of Hormuz, pushing up energy prices.
