India, Dec. 5 -- IndiGo's nationwide operational crisis deepened on Thursday, as fresh flight cancellations and long delays were reported from different cities of the country, leaving thousands of passengers stranded at various airports and the affected air travellers slammed the private airliner, the Ministry of Civil Aviation and the Directorate General of Civil Aviation (DGCA).

On a day when fresh flight cancellations and long delays were reported from Mumbai, Delhi, Bengaluru, Hyderabad and Pune, an upset DGCA summoned senior officials of IndiGo to is headquarters and sought explanation from them on the "massive disruptions" and asked them to submit an urgent plan to stabilise operations during the peak travel season.

The miffed str...