"Anna expanding his committee to include Dalit Tribals Muslims and Youth. Vote Bank ? Political ambitions? Reservation quota ? May be !," Singh, who had recently alleged that the Gandhian was being used as a "scapegoat" by his team members to fulfil their political ambitions, commented on the microblogging site Twitter.
The Congress leader in another tweet asked Hazare and Kejriwal to clarify their stand on reservation saying that they had earlier opposed it.
"Anna and Kejriwal should clarify what is their stand regarding Reservation. Both have opposed reservation publicly," Singh tweeted.
On Monday, Hazare had said he plans to restructure his Core Committee to also give representation to religious minorities, tribals, dalits and youths to strengthen the campaign against corruption.
In yet another teaser, the AICC general secretary asked Hazare to clarify his stand on MNS chief Raj Thackeray's statements against North Indians.
"Anna should also clarify what he has to say about Raj Thakre's statement against North Indians. He had supported Raj Thakre on this issue," Singh said.
Singh's remarks have come on a day when Maharashtra Chief Minister Prithviraj Chavan said it is "amply clear" that Anna Hazare''s associates want to join politics andasked them to be open about it.
"....staying out (of politics)and tacitly supporting or opposing any party is not done," he told a Marathi channel.
In a letter to Chavan two days back, Hazare has slammed him for asking the Centre to give green nod to the first phase of the controversial Lavasa project.