Foggy conditions once again affected air and rail traffic in northern India in the form of several diversions, delays and cancellations. 

ANI reported that nine international and four domestic flights from Delhi were delayed due to fog. One Delhi-Lucknow flight has been cancelled.

Over 80 trains are running late while 13 trains are cancelled (for December 3 and 4) and 40 trains rescheduled due to foggy weather conditions in the northern region, said a senior railway official.