Reliance has purchased at least 15 million barrel of Russian oil so far for the June quarter, trade sources said last week. Reliance did not respond to a request for comment at that time. Nayara Energy, part owned by Russia's top producer Rosneft, has purchased 8 million to 9 million barrels of Russian crude for loading in April-May, trade sources said. Nayara did not respond to a Reuters email seeking comments. Western sanctions against Russia since its invasion of Ukraine, which Moscow calls a "special operation", have prompted many oil importers to shun trade with Moscow, pushing Russian crude's discount to other grades to record levels. While New Delhi has called for an immediate ceasefire in Ukraine, it has not explicitly condemned Moscow's actions.