"I was disillusioned and decided to part my ways with them. Now I want to lead a humane life free from any religious bias," he told reporters here.
He inaugurated a party office at Kamchcha and presided over a function in Khedi lake area.
He also accused the BSP government here of harassing elected representatives in the state.
Citing the example of Mukhtar Ansari, he said once a member left the BSP, he was branded as a corrupt person.
Singh will visit different regions of the Poorvanchal area from December 1-15 over demands of a seperate state.
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