Residents in the national capital and nearby regions got little respite from the toxic smog on fourth straight day with Air Quality Index of several areas falling into 'hazardous' category.

On Thursday morning too, smog permeated several areas, including Rajpath. Residents said they are continuing to exercise precaution by wearing masks.

In Air Quality Index, Delhi's Mandir Marg stood at 515, Punjabi Bagh at 802, Anand Vihar at 571, and Dwarka at 420, all falling in the 'hazardous' category.

In Haryana, Vikas Sadan Gurugram with AQI 391 and Sector16A Faridabad with 348 were in the 'hazardous' category.

Meanwhile, border entry points from where heavy and medium goods vehicles enter into Delhi have been sealed by Delhi Police since 11 pm yesterday.

"On all borders, we have deployed our traffic staff, local police, PCRs. We are checking all vehicles and directing them to return from Delhi borders. We are also in liaison with neighbouring states so that diversions can take place from Haryana and Uttar Pradesh side also," DCP D K Gupta said.

He said vehicles with essential commodities are not being restricted, they are being allowed.  -- ANI