Thick fog blanketed Delhi early Tuesday, reducing visibility and delaying 25 trains. The city recorded a minimum temperature of 10.5 degrees Celsius, reported news agency PTI.

"Minimum visibility of 150 metres in dense fog with northwesterly winds at 11-13 kmph was reported over Palam between 5 and 5.30 am, gradually improving to 700 metres in shallow fog with westerly winds at 13 kmph by 8.30 am," the India Meteorological Department (IMD) said.