Consumer prices in March were up 3.3% from a year ago, the biggest annual increase in nearly two years. Higher gasoline prices tied to the war with Iran accounted for much of the surge.

Gas prices are rising again across the United States, hitting their highest level in nearly four years as escalating tensions in the Middle East push oil markets higher. AAA reported the national average for a gallon of regular gasoline increased by 8 cents over the past week to $4.

U.S. inflation at the wholesale level rose to a three-year high in March due to surging oil prices tied to the Iran war, but aside from energy, the increases in the cost of other goods and services were surprisingly tame.