New Delhi, Jan 31 (IANS) A thick blanket of fog engulfed the Indira Gandhi International (IGI) Airport here Monday causing flight delays and diversions, an official said.

The fog was back in the city after over a fortnight.

The visibility dropped below 150 metres at Delhi airport and CAT III B procedure was operated around 9 a.m., according to the airport authorities.

‘Over a dozen domestic and international flights were delayed while three flights were diverted due to thick fog over the airport,’ an airport official said.

The fog at the airport caught the passengers unawares as after arriving at the airport they had to wait for hours due to flight delays.

‘My flight to Jaipur was scheduled for 7.30 a.m. but it was delayed for over three hours due to fog at the airport,’ said Shruti Singh, a college student.

According to the railway officials, trains were, however, running on time.

Other parts of the city only had a shallow fog, and the weather office forecast has a warmer day ahead.

The minimum temperature was recorded at 8.2 degrees Celsius, normal for this time of the season.

‘There was mist in the morning but skies will remain clear during the day. The maximum temperature is expected to hover around 20 degrees Celsius,’ a Met department official said.

Delhi received light showers Sunday while the maximum and minimum temperature settled around 22.4 and 6.5 degrees Celsius, respectively.