Asian shares rose Monday and oil prices extended gains on worries that escalating Iran-Israel tensions could disrupt the flow of crude around the world. U.S. benchmark crude oil added 71 cents to $73.

U.S. oil prices already jumped last week, which could cause prices at the pump to rise about 20 cents a gallon in the coming weeks, according to one estimate.

Crude oil futures jumped more than 3% Sunday after Israel struck two natural gas facilities in Iran, raising fears that the war will expand to energy infrastructure and disrupt supplies in the region.