New Delhi, Dec. 7 -- Despite the relaxation of flight duty time limitations rules, chaos across multiple Indian airports continued on Sunday morning, with atleast 400 flights cancelled across the country. Major air terminals, mainly at urban centres, have been hit the hardest, with a majority of cancellations concentrated at Hyderabad, Kolkata, and Delhi airports.

Amid the chaos in airports, the Directorate General of Civil Aviation (DGCA) has served a show cause notice to IndiGo's accountable manager.

The worst hit, Telangana's Rajiv Gandhi International Airport (RGIA) in Hyderabad saw 115 flights cancelled today, with 54 arrivals, and 61 departures affected.

According to a statement from the Delhi Airport, at least 59 departures and ...