A man has been charged by police for allegedly making death threats against Brittany Higgins, her fiancé and her dog.
David William Wonnocott, 49, was arrested by counter-terrorism detectives at Tweed Heads Police Station in northern NSW about 10am on Wednesday.
Police said they were already investigating threats of violence made by Wonnocott against participants in the mass rally.
Police said they found 49 threatening or offensive messages sent by Wonnocott from multiple social media accounts.
Police say one of the accounts sent messages from David Sharaz, the fiancé of the former Liberal Party worker, allegedly threatening to kill the couple and their pet dog.
Winocott was charged with using a transportation service to threaten to kill and using a transportation service to threaten, harass or offend.
While in custody, detectives issued a firearms restraining order to the man. A search of his vehicle and home in Banora Point was also conducted.
He was granted strict conditional bail to appear at Tweed Heads Local Court on May 31.
“There is no current or imminent threat to the community from this operation,” NSW Police said in a statement.
“Anyone with information about extremist activity or a possible threat to the community should come forward, no matter how trivial you think it may be.”