Brent crude up almost 10% amid speculation of Israeli or Iranian strikes on energy infrastructure

Israel is considering attacks on Iranian energy sites, for which Iran might then retaliate, affecting global supplies

Wanblad plays down prospects of new bid after failed BHP takeover attempt

US officials believe response to Iranian strike will be measured enough to avoid escalation

Resumption following factional power struggle helps allay concerns over potential disruption from Middle East conflict

A worst-case scenario for the market could send prices spiralling into the triple digits