Adani Group, India’s largest private port operator, has stopped allowing tankers blacklisted by the United States, the United Kingdom, or the European Union to call at its facilities, according to Indian media reports.

The company’s port network, which handles mostly container and dry bulk cargoes rather than oil shipments, is unlikely to be heavily affected by the measure. Analysts note that Russian crude flows to India should continue with limited disruption.

Still, Adani’s decision reflects growing caution in the face of U.S. warnings about secondary sanctions. Washington has been pressing G7 partners to impose significantly higher tariffs on Russian oil exports to major buyers such as India and China.

In August, the U.S. raised duties on Indian goods to 50% as a response to New Delhi’s heavy intake of Russian crude. That move has already pushed Indian refiners to scale back their purchases from Moscow.