Four former Chief Ministers from the Opposition camp were detained in the Capital on Saturday amid the police crackdown on the protests against Chief Election Commissioner Gyanesh Kumar. Former Bengal Chief Minister Mamata Banerjee, former Delhi Chief Minister Arvind Kejriwal, former Kerala Chief Minister Pinarayi Vijayan and former Tripura Chief Minister Manik Sarkar were detained as they tried to join the Cockroach Janta Party (CJP) protest in the Capital.