Mishra and Shahid are considered close to Shivpal, who had recently announced formation of a secular front if Akhilesh did not hand over the reins of the party back to his father Mulayam Singh Yadav in three months.
According to a news agency, Mr Yadav told reporters in Mainpuri that though the Congress left no stone unturned to "ruin" his life, his son Akhilesh Yadav forged an alliance with the party in the run up to the assembly polls. The party would have done better if it had gone alone, he added.
"Samajwadi Party is quiet and is not registering any protest against the BJP government at present".
When asked if his brother Shivpal Yadav had chose to form a new front, Mr Yadav said that efforts should be made to strengthen the Samajwadi Party.
He also attacked the electoral alliance with the Congress, saying that no one was consulted before taking such a major political decision on the eve of the state assembly polls. Shivpal is also likely to meet senior leaders to tap in to discontent. Akhilesh should take the challenge thrown by Shivpal head on and use the opportunity to remove the deadwood, modernise the party agenda and rebuild SP on his own terms.
Hitting out at Mishra over his allegations of corruption against Kejriwal, Singh claimed Mishra had himself written a letter to the ACB in September previous year, saying that the anti-graft body was trying to implicate the chief minister in the water tanker scam under pressure even when his name was not mentioned in the evidence.
Sources close to Akhilesh however say he is the undisputed leader of the Samajwadi Party and that there is no space at the top of the party for anyone else. The party will also include minorities, farmers and youth. They were expelled by the former Chief Minister for "anti-party activities", said the Samajwadi state unit chief Naresh Uttam.
Aparna's statement is likely to further intensify the ongoing family feud in the Samajwadi Party.