A group of Nationals members have quit the party amid an investigation into their alleged connection to alt-right, neo-Nazi and white supremacist groups.
A member of the Young Nationals executive sent a lengthy letter to the party on Wednesday, accusing them of trial by media and leaking private information.
The man, who was implicated in revelations about an alt-right infiltration of the party earlier this month, said he and about 15 others currently under investigation would tender their resignations.
"I have not been given the right of reply or a chance to explain. This is very much a Kafkaesque situation right out of The Trial," the man said.
AAP understands the former member attached another document to his letter containing a list of the 15 members who also tendered their resignations.
The man denied he and his colleagues had been making a known white-supremacist hand-gesture, instead suggesting it could be interpreted "as declaring a point or saying 'bon appetite'".
He also launched a scathing attack on the coalition for its current immigration intake, saying "opening Australia to mass Third World immigration is not 'moderate'. It's extremist."
AAP understands the Nationals ethics committee will meet on Thursday to further investigate the remaining members of the party caught up in the saga.
