The man, aged between 40-45 years, lives with his family in southwest Delhi's Dabri area. He was wanted by the police in connection with a rape case registered at a police station in Dwarka yesterday, said a police official.
From preliminary investigation, it seems that the man wanted to meet the Chief Minister claiming that he was being framed in the rape case by some persons he had personal enmity with, the official said.
The incident took place in the morning and eye-witnesses told police that the man first threw an object inside the compound of the CM's residence.
Failing in his attempt to enter the premises of the CM's residence, the man collapsed and guards there saw froth coming out of his mouth.
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They called up the police and the man was rushed to Lok Nayak hospital, where his condition is now reported to be out of danger, said the official adding that the time when he consumed the poisonous substance is also yet to be ascertained.
Kejriwal is in Kolkata to attend the Global Business Summit organized by the West Bengal government.