Oil prices extended gains on Monday (Mar 16) as the US-Israeli war against Iran entered a third week, putting oil infrastructure at risk and keeping the Strait of Hormuz shut in the biggest disruption to global supplies ever. Brent crude futures jumped US$2.01, or 1.95 per cent, to US$105.15 a barrel by 11.38pm GMT after settling US$2.68 higher on Friday. US West Texas Intermediate crude climbed US$1.61, or 1.63 per cent, to US$100.32 a barrel, after gaining nearly US$3 in the previous session.