Ready, set, choke: Delhi air pollution in pictures, tweeps share pictures in masks

Caroline Hasl: "Wear masks, use air purifiers, seal your windows and doors. Please. #DelhiChokes #AirPollution"

Pragati Singh: "This is the new look for Delhi- NCR (National capital region) people #AirPollution #Noida #airhealthemergency"

A tourist wears a face mask to protect from pollution, as the air quality dips to severe category, at Rajpath in New Delhi on Saturday.

Dhruv Rathee: "Unprecedented Air Quality today morning. Ghaziabad - 1457, Noida - 1542, Jind - 1193, Delhi - 1183."

Delhi: Latest visuals from outside Arun Jaitley Stadium. India will play Bangladesh in the first T20i match, later today.

Many Twitter users in and around Delhi complained of a burning sensation in their eyes and breathing difficulty.

India's capital New Delhi is enveloped in heavy, toxic smog -- the worst levels in recent years -- with flights diverted or delayed as politicians blame each other for failing to tackle the crisis

A picture from Noida, Uttar Pradesh

Aman Sharma: "A Plea from the Children of India Delhi has become an unliveable city. Breathing in Delhi is like sitting in a gas chamber. The toxic air has been slowly and silently killing us by choking our lungs and entering our brains."

Amit Gupta: "Connaught place right now. #DelhiAirEmergency"