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New Delhi, Dec 18 (ANI): As dense fog continues to engulf Delhi and parts of North India amid the dropping temperature, train and flight services remained affected on Sunday morning. As least 26 trains running towards Delhi were delayed while nine trains were rescheduled. Flight services at the Indira Gandhi International Airport were also affected, resulting in the delay of at least five international and three domestic flights. The meteorological department has predicted that the nation will witness an above normal winter this season while northern areas of India will likely have less of cold wave spells.