The Russia-focused company posted a profit of $61.7 million for the three months ended 30 September, compared to $132 million for the same period last year.
It also recorded a decline in earnings before interest, tax, depreciation and amortisation, from $214 million to $175.1 million.
In contrast, revenue for the quarter increased by 12% to $1.01 billion, partly owing to an increase in crude oil and oil product prices.
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