New Delhi: The main Opposition BJP on Tuesday brought Prime Minister Manmohan Singh in the line of firing on the CWG mess, alleging that it was he who overruled then Sports Minister Sunil Dutt and officials to appoint disgraced Suresh Kalmadi as chief of the Organising Committee in 2006.

But during a short duration discussion on CWG in the Rajya Sabha, the Congress hit back with Raashid Alvi saying that the BJP's intention is to take revenge for a muddy Karnataka situation where B S Yeddyurappa had to resign following corruption charges involving Rs 1,800 crore.

Besides the BJP, CPI (M) and CPI sought an explanation from the Prime Minister himself and not from Sports Minister Ajay Maken.

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Initiating the debate on Maken's statement of August 3, wherein he had held the NDA responsible for appointment of Kalmadi as OC Chief, Leader of the Opposition Arun Jaitley said Prime Minister Manmohan Singh overruled objections by the Sports Ministry and his own office and favoured Kalmadi.

He said former Sports Ministers MS Gill and Mani Shankar Aiyar were whistleblowers and vigilant, and officials – both in the Sports Ministry as also the PMO - were against Kalmadi's appointment.

However, the Prime Minister "overrules" each one of them. "Why did he overrule?" Jaitley asked.

Backed by the CAG report which indicted Shiela Dikshit government for in the CWG projects, he said both the Centre and the state government are responsible for the mess.

"If the heads are to roll, it must be the heads of these governments," he said, adding instead NDA has been blamed for "dubious" games structure set up by UPA government.

Mohan Singh (SP) described Manmohan Singh as the "biggest Prime Minister of the most corrupt government". He said that PM still has time to take steps to save his clean image. Besides the Prime Minister, the Opposition also targeted then Finance Minister P Chidambaram.

The debate witnessed Congress clashing with BJP when some of their members raised slogans against UPA Chairperson Sonia Gandhi. The Congress forced three adjournments of the Upper House seeking apology from Jaitley on behalf of his party colleagues.

However, the Leader of the Opposition said that there were no personal remarks against Gandhi, who is recovering from an ailment.

Jaitley said that while Maken did not commit any impropriety, his statement blaming the NDA for making Kalmadi incharge of the Delhi Games was a "monumental deception... practised on this House and on the people of this country."

Shivanand Tiwari (JD-U) said the Government has lost its mandate to rule. "A government which cannot protect its treasure has no authority to rule."

He put the blame on Chidambaram stating he failed to check the scam even when he was heading a sub-committee of Group of Ministers (GoM) on expenditure. "Why did he not step in to check the corruption during the time," Tiwari asked.

Undaunted by the Opposition onslaught, Congress member Alvi tried to put the blame on the NDA. "Kalmadi was appointed by you (NDA government)," he said.

Prasanta Chatterjee (CPI-M) demanded that the Prime Minister be present in the House. "The PM should be here to reply and not the Sports Minister," he insisted.

He questioned why the Prime Minister did not intervene to stop the CWG mess, even when the CAG in its mid-term report in July 2009 gave its interim findings.