The United States revokes an authorization related to Iranian oil sales after recent tanker attacks, according to reports from multiple outlets. The change restricts or ends the ability to conduct certain oil-related transactions involving Iran that had been allowed under the prior U.S. license. Market coverage indicates the decision also affects expectations for crude oil supply and related flows, with traders responding to the heightened risk surrounding shipping and energy shipments in the region. One outlet reports that oil prices rise following the announcement, reflecting concerns that the revocation could reduce accessible supply and increase disruption risk. While the specific legal or licensing details are not fully described in the brief excerpts, the common thread is that the U.S. action is directly tied to the tanker attacks and that it is intended to tighten sanctions or compliance pathways concerning Iranian oil. Overall, the reported developments link the U.S. policy move to security incidents involving tankers and highlight immediate market reaction in crude oil prices.