Prime Minister John Key says it is disappointing that the Parliamentary Service passed over information about a journalist's movements around the parliamentary precinct.
The service has confirmed it handed over information relating to where the journalist's swipe card was used to an inquiry into a leak of a report into the Government's spy agency.
The report's release prompted the resignation of Peter Dunne as a minister for corresponding with the reporter, Fairfax's Andrea Vance, and canvassing the possibility of leaking the report.
Mr Dunne maintains that he was not the source.
John Key says it's not appropriate for politicians to look into reporters' activities, even if it is in line with a government inquiry.