Ukraine has paused drone strikes on oil tankers at Russia’s Black Sea port of Novorossiysk after a request from U.S. Vice President JD Vance, Kyiv officials told the Financial Times.

The paper said last month's request followed ​U.S. alarm that Ukraine was destabilizing ​oil markets ⁠and harming U.S. firms by targeting tankers carrying crude piped from Kazakhstan to a Caspian Pipeline Consortium (CPC) terminal at the port.

Ukraine agreed not to target CPC infrastructure or non-Russian vessels as long as the latter were not under Ukrainian sanctions and were not carrying Russian oil or cargo, the newspaper added.

The White House, State Department and Vance's ⁠office ⁠did not immediately respond to Reuters requests for comment outside business hours. Reuters could not immediately verify the report.

Ukrainian forces recently stepped up strikes on Russian energy infrastructure and other sites in an effort Kyiv says aims at depriving Russia of resources to fund its military.

Black Sea drone ⁠attacks took out as much as a fifth of CPC oil loadings in July, four sources familiar with the ​data said, as the Russia-Ukraine war spilled over to hit ​sales by Kazakhstan and western oil majors.

Kazakhstan, which relies on the CPC route for ⁠crude exports, suffered ‌a drop of 14% in oil ⁠production in July versus June, the ‌sources said. Chevron and Exxon Mobil are among the major ​Western oil companies ⁠operating there.

A U.S. official confirmed to ⁠the paper that the administration had warned Ukraine ⁠to stop attacking ​non-Russian vessels in the Black Sea.