India, Dec. 15 -- Multiple vehicles collided on the Eastern Peripheral Expressway in Greater Noida on Monday due to dense fog. A thick layer of fog gripped Delhi-NCR, reducing visibility to nearly zero.

A video shared by news agency PTI showed multiple vehicles piled up on a busy road, causing damage and disrupting traffic. There was no word yet on casualties, if any, as of Monday afternoon.

The India Meteorological Department (IMD) has issued an orange alert for Delhi due to dense fog. Temperatures were recorded below 12 degrees Celsius in the capital city on December 15.

More than 60 flights were cancelled and over 400 delayed as a dense blanket of smog continued to cover Delhi and its adjoining areas on Monday morning.

Earlier, Del...