BSP general secretary Satish Chandra Mishra said the Rajya Sabha has condemned the BJP leader's remark, adding that they would take this matter forward as it is an offence.
"The government will not register any FIR in this regard. We will register an FIR against him under the SC/ST Act and will take all required legal actions against him and drag him to court," Mishra told the media here.
"We will lodge the FIR today itself," he added with affirmation.
Meanwhile, Dayashankar Singh has been removed as his party's vice-president in Uttar Pradesh. This came after the Rajya Sabha witnessed chaos before being adjourned till 11 a.m. on the same issue.
There was uproar in the Upper House earlier as the BSP leaders demanded Dayashankar Singh's arrest for his unwarranted remark against the former Uttar Pradesh chief minister.
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Finance Minister Arun Jaitley earlier expressed 'personal regret' in Parliament over Singh's remark.
"It is not right and I condemn the use of this word. And if a person has said this, we will investigate. I express personal regret. I associate with your dignity and stand with you," Jaitley told Mayawati in the Rajya Sabha.
The BSP chief on her part thanked Jaitley and other leaders in the Rajya Sabha for supporting her on this matter.
"There are war of thoughts and ideas in the House, but never have I used derogatory words against anyone ever," Mayawati said.
"Dayashankar Singh should be arrested otherwise if in response to this the people get violent, it will not be on my conscience," she added.
Singh, however, later tendered an apology for his remark.