The Joint Parliamentary Committee, which met after nearly a month, witnessed a virtual repeat of August 22 meeting when BJP members stormed out following a clash with Congress members.
As soon as the meeting started, BJP members wanted resumption of discussion on finalisation of list of witnesses, a matter that had provoked a clash last time.
However, Chacko rejected it, saying the Committee was slated to hear presentation by RBI Governor D Subbarao, who was the Finance Secretary when 2G Spectrum was allotted in 2008, and could not discuss anything else.
Four of the six BJP members present in the meeting, including Yashwant Sinha, were upset at this and walked out.
BJP wanted inclusion of Prime Minister Manmohan Singh and Finance Minister P Chidamaram in the final list of witnesses.
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After staging walkout, BJP accused Chacko of being 'biased' and threatened to quit the panel, saying a decision in this regard will be taken soon.
Sinha said his party has lost faith in the panel and did not expect it to uncover the truth.
Chacko hit back charging BJP with trying to "throttle and kill" the Committee for its political interests. (MORE)