Private BS III petrol and BS IV diesel vehicles were banned from roads with violations inviting a penalty of ₹20,000.

A dense layer of smog enveloped Delhi for the fourth consecutive day and the AQI was recorded at 406 as of 8 am on Saturday morning, according to the CPCB.

After reaching a peak, Delhi’s AQI has remained in the ‘severe’ category for the fourth day in a row. Covered in a thick blanket of fog and pollution, the poor visibility has even caused many school to remain closed for the past few days.

Chief Minister Atishi announced a revision of working hours across government offices to combat pollution and reduce traffic congestion on Friday.

Some other steps taken by the Delhi government include extra Metro trips, ban on construction work, dedicated shuttle buses for government employees and primary schools being shut.

Delhi's AQI hits a hazardous 404 with smog blanketing the city; restrictions imposed, including school closures and fines for violators.

According to Central Pollution Control Board (CPCB) data, Anand Vihar recorded an AQI of 436, Bawana at 438, Dwarka Sector 8 at 410, Mundka at 421, Alipur at 437, Burari Crossing at 429, Lodhi Road at 426,

Air pollution choking New Delhi has ground outdoor work to a halt and disrupted air travel in the Indian capital.

The GRAP 3 curbs in Delhi include ban on demolition and construction activities, and entry of certain vehicles inside Delhi-NCR, among other curbs, to prevent further deterioration of air quality.