Prime Minister John Key has dismissed media reports that there is a police investigation into National MP Mike Sabin as rumours.
There have been reports in some news media since December last year that police were investigating allegations against Mr Sabin, who is the chair of the law and order select committee.
Mr Key told Morning Report Mr Sabin remained a fully functioning member of caucus.
The prime minister said he had taken legal advice about what he describes as rumours.
"I'm obviously aware of people wanting to make allegations but I'm just not in a position for a variety of different reasons, legal and otherwise, to want to make comments about that," said Mr Key
"I've got very good advice that I shouldn't be making comments about either him or anybody else."
John Key said he would not buy into a rumour mill and he was happy for Mr Sabin to continue in his role with the law and order select committee.
He said if he was required to comment on the case, he would.