Oil prices leapt to nearly $110 a barrel after Iranian media reported an airstrike hitting a facility on the world's largest natural gas field.
The Brent crude oil benchmark hit $109.91 a barrel just after 14:30GMT, more than 5% higher than Tuesday's prices. It remains above $108.
The surge followed a report from Tasnim, a news agency affiliated with the Islamic Revolutionary Guard Corps (IRGC), that Iran's petrochemical complex on the South Pars gas field had been hit.
The benchmark UK gas price also jumped by 6% to 143.53p a therm before falling back below the 140p mark.
While the price of both oil and gas spiked, they remained below highs seen earlier in the conflict.
