"The JD(U) leadership has taken note of our own MLA Girdhari Yadav being seen in the company of Shahabuddin at the time of the latter's release from jail," party spokesman Sanjay Kumar Singh told reporters.
"We cannot accept Yadav's conduct in being seen with the RJD strongman when he spewed venom on our Chief Minister Nitish Kumar ... JD(U) is mulling action against him," he said.
Yadav represents Belhar Assembly seat in Banka district.
Not stopping at questioning Kumar's credentials for the chief minister's post, Shahabuddin had reportedly said yesterday that he was not a mass leader.
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The outbursts by Shahabuddin and another RJD leader Raghuvansh Prasad Singh, who claimed that he was opposed to the chief minister's mantle being given to Nitish Kumar, has caused rift within the ruling Grand Secular Alliance.
Stung by Shahabuddin's acerbic remarks, another JD(U) spokesman Niraj Kumar had hit back yesterday and threatened strong action against the RJD leader but did not elaborate.
Defending his meeting with the RJD strongman, Giridhari Yadav said he met Shahabuddin because of his personal relations with him.
"I have a friendship and personal relation with Shahabuddin and that's why I had gone to meet him (Shahabuddin) after his release from jail (in Bhagalpur)," Yadav told