The train services will remain suspended between December 31 and February 15. Janata Express, Allahabad-Haridwar Express, Kumbh Express, Lucknow-Barauni Express, Barauni Mail, Delhi-Sialdeah Express and Rajdhani Express are among the trains that have been cancelled, officials said.

Others include Avadh-Assam Express and the Chapra-Mathura Express. Officials admitted the cancellations will be inconvenient for the passengers, but said they were helpless because of the weather conditions.

"We cannot risk the life and safety of passengers nor make them bear endless delays in train schedules," said an official.

More than 12 trains were running delayed due to dense fog on the outskirts of the city, the official said, adding the condition will only worsen in the coming days.

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