4 former Chief Ministers detained by Delhi Police. Delhi Police has detained four former Chief Ministers amid the crackdown on the protests against Chief Election Commissioner Gyanesh Kumar on Saturday. These included ex-West Bengal CM Mamata Banerjee, ex-Delhi CM Arvind Kejriwal, ex-Kerala CM Pinarayi Vijayan and ex-Tripura CM Manik Sarkar. Several TMC and CPI(M) MPs were detained along with AAP leaders.