Fianna Fáil leader Micheal Martin has accused the Government of "not being fully transparent" about the financial backers of the National Broadband project.
During Leader's Questions in the Dáil, Mr Martin told Taoiseach Leo Varadkar that there had been a "drip feed" of conflicting information about the investors.
The Taoiseach responded that €175m of the upfront contribution is coming from Tetrad Corporation and the rest from Granahan McCourt Ireland.
He said McCourt Global was one of two companies the bidder relied on to demonstrate its capacity to meet the financial criteria at pre-qualification stage.
"There is no issue with any bidder relying on the resources of other companies," Mr Varadkar said.
Mr Varadkar acknowledged that a response to a parliamentary question last week identified McCourt Global as the ultimate investor, but he said the Department had corrected the record in relation to McCourt Global's role.
However, Mr Martin asked Mr Varadkar what he was hiding about the relationship between the entities.
"Global McCourt has now disappeared," Mr Martin said.
Mr Martin also called on former minister Denis Naughten to answer questions in the Dáil about contacts with the parties when he was in office.
Mr Varadkar said the Government had been transparent on the issue, and accused Mr Martin of "weaving a conspiracy theory".
