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.

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.

Oil prices jumped in early Asian trade on Monday after Israel and Iran launched fresh attacks on Sunday, heightening fears that escalating battle could trigger a broader regional conflict and widely disrupt oil exports from the Middle East.