Senior JD-U leader and spokesperson K.C. Tyagi had Thursday announced the party's support to Kejriwal's candidature in the Uttar Pradesh holy city.
But differences among party members soon surfaced when party president Sharad Yadav questioned Tyagi's announcement, saying he was not aware of it and that it was not a party decision.
Bihar JD-U president Vashsisht Narain Singh said no party leader from the state will campaign for Kejriwal in Varanasi.
"Tyagi's decision to support Kejriwal was taken in a hurry without consulting others," Singh told the media here.
"Till now, (Bihar) Chief Minister Nitish Kumar is yet to say anything on support to Kejriwal," a leader close to Nitish Kumar said.
The Lok Sabha polls will be held in Varanasi May 12, the last phase of the 2014 general elections.
Aam Aadmi Party leader Arvind Kejriwal was the Delhi chief minister for 49 days after the party's stunning debut in the December 2013 assembly elections. He is contesting against Modi and the Congress' Ajay Rai.