The ABC has demanded an explanation from Pauline Hanson's One Nation Party after its reporters were blocked from attending election celebrations on Saturday, describing the move as an attack on independent media.
ABC reporters were locked out of a West Australian election night event in Perth, as a controversial preference deal with the Liberal Party and Senator Hanson's comments on vaccinations and praise for Russian president Vladimir Putin saw One Nation's message all but drowned out.
West Australian Nationals leader Brendon Grylls has conceded defeat in his seat of Pilbara, following a $2 million campaign against him by the mining industry angry at his iron ore tax proposal.
Speaking to Australian Associated Press, Mr Grylls said he would not be able to overturn a deficit of several hundred votes.
The ABC's election computer no longer lists Pilbara as a seat in doubt, putting Labor's Kevin Michel more than 500 votes ahead and declaring the seat for him.
"I can't come back from this," Mr Grylls said.
It is understood Mr Grylls will meet Mr Michel later today to concede defeat in person.
Mr Grylls has been contacted for further comment.