The House saw BJP, Congress and Left making a common cause to target the Trinamool Congress (TMC) on the issue, even as Mamata Banerjee's party claimed that the charges were a political conspiracy ahead of the West Bengal polls.
Heated exchanges were witnessed between Trinamool Congress and Left members after Mohd Salim of the CPI(M) raised the issue during Zero Hour and was followed by BJP's S S Ahluwalia and Adhir Ranjan Chowdhury (Congress) slammed the TMC and sought a probe.
Responding to the members, Parliamentary Affairs Minister M Venkaiah Naidu said "the prestige of Parliament is at stake. We have to establish the truth. Simply saying it is a conspiracy is not enough and will not satisfy the public."
Either the government can carry out an inquiry or the Speaker can order an inquiry, he said.
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Naidu's response came after members of different political parties demanded a probe.
TMC members sat silently for most of the time as Salim was followed Ahluwalia and Adhir Ranjan Chowdhury in attacking them, but angry exchange of words took place when TMC leader Saugata Roy, one of the MPs allegedly shown in the sting, put up his party's defence.
TMC members and some from Congress and the Left were heard trading charges against each other, which were expunged by the Speaker.
"This is related to the dignity of the House. They (TMC MPs) have been caught. It must be probed," Chowdhury said.
In an apparent criticism of Roy's objections to the issue
being raised in the House, Naidu said members should not give an impression to the public that "we are hiding under some rule or pretext."
He said that parliamentarians often faced criticism from the people as he pitched for a probe to "dispel the wrong impressions."
Naidu urged the Chair to take a call on this, reiterating that the government can order a probe or the Speaker can look into the matter.
In the Rajya Sabha, Left parties and BJP repeatedly tried to raise the issue of the sting operation, but were disallowed by Deputy Chairman P J Kurien.
"You are a senior member of House. Have you given a notice? Without notice I am not allowing any allegation against anyone," Kurien said.
As BJP members too joined to raise the issue, he said, "I have made it very clear. Without a proper notice, I am not going to allow any allegation."
He then went on to expunge the allegations made by members. "If it is a serious matter, why dont you give notice," the Deputy Chairman said.
"Chair cannot be cowed down by this kind of behaviour," he said. "Treasury benches should not behave like this. Treasury benches should cooperate with chair."
Kurien said he was not saying the matter should not be discussed. "I am saying give notice so that it can be considered. I will consider giving time (for discussion).