"Kejriwal is an agent of America who on the pretext of running an NGO is dancing to the tunes that country," Prasad said while addressing his 'Parivartan rally' here.
Coming down on Kejriwal and BJP President Nitin Gadkari, he said they were 'mentally ill' and need to get 'cured' at Baba Ramdev's yoga camp.
Prasad also criticised Bihar Chief Minister Nitish Kumar and said he was 'faking' that he was a secular leader and people were now flocking to 'Parivartan rally' as they had seen his real face.
"After taking training from me he has gone to sit on the laps of the communal RSS," the RJD leader said referring to Kumar's days in erstwhile Janata Dal.
Today's rally was also addressed by former union ministers Raghubansh Prasad Singh and Mohammad Taslimuddin besides state RJD chief Ramchandra Purbe and party MLA Ashrul Imam.