Asian shares are mixed and oil prices have climbed further as escalating Iran-Israel tensions threaten to disrupt supplies of crude.

Oil prices were volatile on Monday, after surging 7% on Friday, as renewed strikes by Israel and Iran over the weekend increased concerns that the battle could widen across the region and significantly disrupt oil exports from the Middle East.

Oil futures jumped as the market reopened Sunday night, building on last week’s surge after Israel attacked Iranian energy facilities over the weekend and underlining fears around potential disruption to Middle Eastern crude flows.