Gas prices jumped to four-year highs and oil prices rose again after an escalation of attacks by Israel and Iran on gasfields heightened fears of prolonged disruption to international energy supplies.On Thursday, QatarEnergy told Reuters Iran had damaged facilities that produced 17% of the state-owned company’s liquefied natural gas (LNG) export capacity and that it would take three to five years to repair them.Brent crude, the global oil benchmark, rose by 8% to $116 a barrel. Crude prices have...