Safety'Security and stability' of global supplies under threat as airstrikes hit Saudi oil installationsOil prices soar above $71 per barrel as tensions escalate with YemenAttack: on oil storage tank in Ras Tanura, Saudi Arabia. Above, a general view of Saudi Aramco's Ras Tanura oil refinery and oil terminal in Saudi Arabia in May 2018Photo: REUTERS/SCANPIXAmanda BattersbySingapore