As dense fog enveloped parts of North India earlier today as another collision took place on the Lucknow-Agra expressway. Uttar Pradesh: Dense fog engulfs Lucknow as cold wave intensifies pic.twitter.com/PP2Skyx5OP — ANI UP (@ANINewsUP) December 19, 2017 × Reportedly, ten cars collided with each other due to low visibility caused by dense fog near Bangarmau near Unnao in Uttar Pradesh. Multiples injuries have been reported with no account of the loss of life so far. Uttar Pradesh: Multiple injuries caused in collision between ten cars due to dense fog on Lucknow-Agra expressway near Bangarmau in Unnao district pic.twitter.com/dkIZqBZ69u — ANI UP (@ANINewsUP) December 19, 2017 × Similar incidents were reported previously, one of the latest being that of a collision that took place at the Noida expressway. Cars rammed into each other leaving at least 6 injured on the Noida expressway, near Greater Noida’s Dankaur area in November. North India, Delhi-NCR, particularly battled a dip in air quality and poor visibility later this year. Plummeting air quality continues to be a cause for concern here as cold weather aggravates.