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.

TOKYO (Reuters) -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.