Hegde said in Bangalore that he was not party to the decision to target Singh, Pranab Mukhrjee, S M Krishna and other ministers.
Hazare himself appeared to distance himself from the move to target Singh and described the Prime Minister as an "honest man" soon after his team put Singh's name on a list of 14 "corrupt" ministers last Saturday. He had said that he will seek clarification from the team.
"I am not party to the decision-making process. If I don't agree to a decision and if I don't express my view, then I am left presumed to be party to the decision," he said adding he does not know the content of the charges levelled against ministers.
"If the contents are known to me and if the content indicates the involvement of the particular ministers and acceptable to me, then I will go with them. But since I do not know, I am not compelled to put my tongue and chin into it.
"...I do not have the material that they had sent to the Prime Minister seeking investigations. I said I do not have to do anything with those allegations," he said.
However, he added that he was not walking out of Team Anna. "If they want me to go out of Anna's team, then it is another matter," Hegde, who had earlier opposed Team Anna's anti-Congress campaign during Hisar bypolls, said.
To questions on Hazare's views on Singh, Bhushan said most of the documents are in English and Hazare cannot read the language.
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"So these large number of documents have to be translated into Hindi to enable him to go through it. It is not possible to translate all these documents that fast so that he can read it. He knew the larger points like which minister has what charges against him and all.
"But on the Prime Minister, he did not know the whole matter. But he has full faith in us that we are doing the right thing, that the panel has vetted it," Bhushan told reporters here. (MORE)