Primary schools in Delhi will be closed from tomorrow, Chief Minister Arvind Kejriwal announced on Friday as air pollution in the city worsened. Delhi's Air Quality Index continued to remain in the 'severe' category for a second consecutive day on Friday, as per data released by SAFAR or System of Air Quality and Weather Forecasting And Research. Addressing a press conference with Punjab Chief Minister Bhagwant Mann, Mr Kejriwal said primary schools will be closed from tomorrow and outdoor activities for classes V to VII will be restricted until air quality in the city improves.