All the Cabinet ministers were scheduled to discuss a plan to deal with air pollution at 4 PM, but the meeting had to be cancelled in view of the situation that prevailed following the suicide of the 70-year-old ex-serviceman.
Kejriwal said, "We are having to postpone the Cabinet meeting. Why? Because the Centre has resorted to hooliganism."
AAP volunteers later staged a protest against his detention outside Parliament Police station.
In the evening, police had to detain Chief Minister Kejriwal when he was going to Connaught Place Police station, where, according to him, Grewal's son was detained.
Three days after Diwali festivities, the national capital remained shrouded in a cover of thick smog, laden with high level of pollutants which kept air quality in the 'severe' category.
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