New Delhi:  Dense fog engulfed the national capital today, which resulted in largescale disruption of air and rail traffic.

The fog, which reduced visibility drastically in the night and in the early morning hours, however, started receding around noon and flights operations resumed at the Indira Gandhi International Airport.

The Runway Visibility Range, which was reduced to 100 metres in the early hours, has gone upto 1200 metres at 1115 hours allowing normal air traffic, an airport spokesperson said.

"The situation is normal now. The first plane, an Indian flight, arrived here from Hyderabad," he said.

At least 16 flights from the IGI Airport were cancelled since 2200 hours last night till 0930 hours today while 30 others were diverted due to poor visibility.

Northern Railway sources said that due heavy blanket of fog along the railway track, 14 long-distance trains were running behind schedule with Farakka Express from Malda to Delhi was delayed by eight hours and thirty minutes.

However, there was no disruption of schedule of any train leaving capital's three major stations - New Delhi, Old Delhi and Hazarat Nizamuddin.

Delhi experienced 3.2 mm rainfall overnight which brought down the temperature and the minumum temperature was recorded at nine degree Celsius, three degrees above normal.

The weatherman has forecast a partly cloudy sky throughout the day and light rains in some parts of the city. The minimum temperature is likely to be around nine degree Celsius.