India, Nov. 7 -- More than 100 flights were delayed at Delhi's Indira Gandhi International Airport (IGIA) on Friday morning following a technical issue with the Air Traffic Control (ATC) system. Airport authorities confirmed that efforts were under way to resolve the problem.

With over 1,500 aircraft movements each day, IGIA is the busiest airport in India. In a passenger advisory, Delhi Airport stated, "Flight operations at IGIA are experiencing delays due to a technical issue with the Air Traffic Control (ATC) system. The team is working hard to find a quick solution."

Travellers were advised to remain in contact with their respective airlines for the latest updates on flight schedules.

At major airports such as IGIA, air traffic man...