Coal-fired utilities around New Delhi were still operating on Wednesday despite threats from the Indian authorities to close them down if they had not installed equipment to cut emissions of sulfur oxides by the end of the year.

Three senior executives at companies operating power plants around New Delhi that had faced a deadline of the end of 2019 said they had not received direction on whether they could continue to run the plants having not installed the kit.

Only one out of the 11 utilities in the national capital region had installed the equipment.