Lawyers for the Irish Times have told the Mahon Tribunal that they will not be revealing the source of the leak that has left the Taoiseach in major political trouble.
The newspaper's editor and public affairs correspondent have been summoned to appear before the inquiry today to answer questions about the source of the leak.
However, their lawyers have told the tribunal that, while they respect its work, they will be fulfilling their right to freedom of expressing and will not be revealing sources.
The hearing also heard that editor Geraldine Kennedy had destroyed the relevant documentation.