A Morrison government staffer involved in a group which shared images of themselves performing sex acts in Parliament House has been sacked.
Ten News reported on Monday a small group of staffers had set up a Facebook Messenger group that enabled them to share images and video of sex acts.
An unidentified whistleblower said at times the acts had been performed on the desks of female MPs.
Prime Minister Scott Morrison said the staff member at the centre of the allegations had been identified and immediately terminated over the "disgusting and sickening" behaviour.
"I urge anybody with further information to come forward," Mr Morrison said in a statement.
He also urged staff and former staff to use a serious incident support line if they considered it appropriate.
"The actions of these individuals show a staggering disrespect for the people who work in parliament, and for the ideals the parliament is supposed to represent," he said.
The prime minister flagged he would have more to say "on this and the cultural issues we confront as a parliament" in coming days.
Finance Minister Simon Birmingham earlier said the matter showed "enormous disrespect for the employing member or senator in relation to those staff and those officers".
"It equally shows a complete contempt for the Australian taxpayers who have paid the wages for such staff and, in my opinion, any individuals who engaged in such activity ought to prepare to pack their bags and leave the building for good."
Senator Birmingham said it further demonstrated the need for the inquiry by Sex Discrimination Commissioner Kate Jenkins into parliament's workplace culture.
"I want to see this sort of behaviour stamped out," he said.
Labor senator Tim Ayres responded: "It does beggar belief."
