Béla Varga, owner of the extreme right-wing website kuruc.info, registered in the US, has fled to Canada after the FBI issued a warrant for his arrest.
Varga, a resident of California, is a Canadian-Hungarian dual citizen.
Varga is suspected of harassing and threatening to kill the lawyer who had obtained a subpoena to question him about the website.
He was arrested in California in May but set free on $250,000 bail. When he failed to appear at two hearings in San Francisco, a warrant for his arrest was issued. Varga, his wife and two sons then fled to Canada.