"dense-fog"

The weather department has predicted thunderstorm with rain during the day for the national capital

Low visibility procedures (LVP) had to be implemented at the airport from 7 am

The intense fog softened the city's bustling atmosphere and slowed down early morning commuters who navigated reduced visibility

The satellite image taken at 1430 hrs (IST), showed a fog layer continuing over Punjab, Haryana, extreme north Rajasthan, Uttar Pradesh, and northwest Madhya Pradesh

Dense fog seems to be the reason behind the pile up, police said and added that the highway has been cleared for traffic movement.