President Trump accused India of aiding Moscow’s war on Ukraine by purchasing Russian energy, derailing trade talks between India and the United States.

India fired back at the United States after President Trump pledged to increase tariffs on New Delhi over the country’s purchase of Russian oil. In a statement Monday, India’s Ministry of External Affairs (MEA) said the purchase of Russian oil is a “necessity” to “ensure predictable and affordable energy costs” and was once “encouraged”

Russian oil exporters are predicted to take in $153 billion this year, according to the Kyiv institute. Fossil fuels are the single largest source of budget revenue. The imports support Russia’s ruble currency and help Russia to buy goods from other countries, including weapons and parts for them.