The Commission for Air Quality Management (CAQM) has invoked Stage II of the Graded Response Action Plan (GRAP) across Delhi-NCR as the city's air quality slipped into the "very poor" category, with the AQI crossing 300 mark, reported news agency PTI.

The move came after the Sub-Committee on GRAP on Saturday reviewed the worsening pollution levels and forecasts by the India Meteorological Department (IMD) and the Indian Institute of Tropical Meteorology (IITM), which warned of further deterioration in the coming days.