Delhi witnessed the first fog of the winter season today which delayed the schedule of over 25 domestic and international flights at the IGI Airport in New Delhi.

The flights were delayed as the runway visibility dropped to less than 50 metres, bringing landing and take-off to a halt for over an hour, an airport official said.

This is the first fog of the winter season, which started to descend at the airport early in the morning, but as the day progressed it become dense.