A major accident was averted on Friday, after an Air India flight en route to Guwahati from Delhi suffered a bird hit while landing at the Guwahati Airport. At the time of the incident, 160 passengers were onboard the Air India flight. So far, no casualties have been reported. Meanwhile, over 25 flights were cancelled and more than 150 delayed at the Indira Gandhi International airport as operations came to a halt for over an hour due\u00a0to dense fog.\u00a0No flights could either land in or take-off from the Delhi airport between\u00a07.30 am and 9 am\u00a0as visibility dropped\u00a0below the minimum requirement, according to airport sources.\u00a0Nearly 21 flights were diverted to nearby airports, they\u00a0said. More than 25 domestic flights were cancelled and nearly\u00a0140 were delayed due to cascading effect from disruptions during the morning peak hours. Almost 15 international flights\u00a0were also delayed.\u00a0Delays of four to five hours were common throughout the day. The runway visual range at the IGI had fallen to 25 m, which is less than the minimum requirement for both landings and take-offs.\u00a0Delhi airport has advanced technology for low-visibility\u00a0landings, called CAT IIIB. As a result, landings can take place with a visibility of 50 metres. However, for take-offs a minimum visibility of 125 metres is required.\u00a0Air India senior pilots Nivedita Bhasin tweeted, "Our 2- hour flight became a 5-hour flight. All we heard was\u00a0#FollowMe's."