NEW YORK ? Amazon said it will add a temporary 3.5% fuel and logistics surcharge for many third-party sellers in the United States and Canada, a move that shows how the war in Iran is feeding through from energy markets into retail distribution costs.

According to The Associated Press, the surcharge will begin April 17 for sellers using Fulfillment by Amazon and later extend to Buy with Prime and Multi-Channel Fulfillment, with the company saying it had absorbed the higher costs for as long as it could.

Amazon's decision fits into a wider delivery-industry shift. AP reported earlier that the U.S. Postal Service was seeking a temporary 8% charge on Priority Mail and other products to offset transportation costs, a step officials explicitly linked to fuel and operating pressures.

Those higher costs emerged as oil markets remained volatile during the Iran conflict. In its April 8 market coverage, AP said crude prices had swung violently in response to ceasefire news, after previously climbing on fears that shipping through the Strait of Hormuz could remain blocked.

Amazon said the surcharge would remain temporary, but the decision underlined how quickly geopolitical shocks can work their way into e-commerce margins and, eventually, consumer prices.