The Taoiseach Leo Varadkar says he is not satisfied with the information he has been given by the Department of Justice.

But he says he has confidence in the Tánaiste Frances Fitzgerald.

It has also emerged that Ms Fitzgerald received an e-mail about Sergeant Maurice McCabe three days before he was cross-examined by the O'Higgins Inquiry.

Ms Fitzgerald will tonight address the Seanad as the controversy persists.

The Dáil is again focusing on the timeline of events about when the former Justice Minister knew about a garda strategy to discredit Mr McCabe.

Opposition TDs have again said Ms Fitzgerald has outstanding questions to answer on her response to an e-mail regarding Maurice McCabe and a garda strategy to discredit him at the O'Higgins inquiry.

Fianna Fáil leader Michael Martin questioned the Tánaiste's decision to do nothing, even though the e-mail said she had no function.

"What's at the heart of this is a terrible vista that an appalling set of actions were afoot to undermine this man's credibility and character", Mr Martin told the Dáil.

"And it's simply not good enough, Taoiseach, to say that a minister in charge of a portfolio on the most explosive issue that has hit this Dáil in the last three years just merely stands by".

Sinn Féin's Mary Lou McDonald said the timeline did not add up.

"The date on the e-mail, I understand, conveying the malicious nature of the garda legal strategy was sent to the Tánaiste on May the 15th - that's three days prior to the cross-examination - isn't that correct?

"Does this mean, Taoiseach. that Frances Fitzgerald sat back and allowed Maurice McCabe to go before the commission in full knowledge of the Commissioner's vicious strategy?".

And Deputy McDonald asked the Taoiseach if he still had confidence in the Tánaiste, to which Mr Varadkar replied: "Yes I have confidence in the Tánaiste - but no I'm not satisfied with the fact that on a number of occasions - on at least two occasions in the past week - I've been given incomplete information from the Department of Justice.

"My role here is to account for the Government to the House, and it is not something that I'd like to see happen - and that's why I've asked for a full trawl of documents in the Department of Justice to occur".

Meanwhile Labour has said they will not support the Tánaiste if it comes to a confidence motion.