DELHI: Dense fog continued to disrupt normal life in the national capital and surrounding areas for the second day today with close to zero visibility in several areas. All flight operations have been suspended at the Indira Gandhi International Airport since 5 am today.

According to airport authorities at least 74 domestic and 25 international flights have been delayed. The visibility on runways is likely to remain low till 10 am and the backlog of flights will continue to affect schedules after that.

The dense fog also delayed trains coming to or going out of Delhi causing difficulty for passengers. Railway officials said at least 14 trains are delayed.

Commuters also faced problems on the roads. Four people have been killed and nine others injured in a road accident due to dense fog on Yamuna Expressway.

Besides Delhi NCR a thick blanket of fog has also been reported from cities like Lucknow, Amritsar and Varanasi.