A Privileges complaint has been laid with Parliament's Speake after accusations that two veteran Labour MPs behaved badly in front of senior police officers at a Law and Order select committee.
Trevor Mallard stormed out of the hearing in anger last week at having his questions to the Deputy Police Commissioner blocked moments after he appeared to threaten the man's job.
Phil Goff also argued with committee chair Jacqui Dean and swore after his questions about police redundancies and station closures were stifled.
Mrs Dean has complained to the Speaker David Carter about the outbursts, which she said were unacceptable.
Mr Carter will determine if there is a case to answer before the matter goes any further.