In his reaction, Akhilesh Yadav said he welcomes more "secular politics".
Akhilesh Yadav has expelled five Samajwadi Party leaders, including a loyalist of uncle Shivpal Yadav, who announced a breakaway outfit last week.
The five are Shivpal Yadav's aide Deepak Mishra, ex-party spokesperson Mohammad Shahid, Rajesh Yadav, Ramesh Yadav and Kallu Yadav of Noida. They were expelled by the former Chief Minister for "anti-party activities", said the Samajwadi state unit chief Naresh Uttam.
Last week, Shivpal Yadav, 77, said he was floating a new outfit, headed by his older brother Mulayam Singh, Akhilesh Yadav's father.
Described as a "secular front,' it will be called Samajwadi Secular Morcha, said Shivpal Yadav, who is seen as a primary reason for the estrangement between Akhilesh Yadav and Mulayam Singh ahead of the election in Uttar Pradesh.
In his reaction, Akhilesh Yadav said he welcomes more "secular politics," and added, "I don't know what shape this will take. As for the Samajwadi Party, it has passed every test and will continue to do so."
Akhilesh Yadav, 44, wrested control of the Samajwadi Party in January, replacing his father as President, a decision which was not welcomed by the patriarch.
Shivpal Yadav has blamed Akhilesh Yadav for the Samajwadi Party's humiliating defeat and said he would launch a new party if he did not reinstate his father at the head of the party.