Christchurch terror attack: Austrian far-right activist Martin Sellner's home raided over possible ties to alleged gunman

A prominent far-right activist's Austrian home was raided as part of an investigation into possible ties to the man alleged of carrying out the Christchurch terror attacks.

Electronic devices were seized from the home of Martin Sellner on Tuesday after Austrian intelligence found he had received a "disproportionately high donation" from a person with the same surname as the accused Christchurch gunman.

A spokesperson for Austria's Interior Ministry told the Associated Press that the country's intelligence agency has searched Sellner's home, while the Austrian Chancellor tweeted his support of the investigation.

"Every connection between the Christchurch suspect and members of Identitarians in Austria must be cleared completely and ruthlessly," Sebastian Kurz tweeted.

Austrian prosecutors also said they had come across a sizeable donation as part of the investigation, but declined to say how much it was. The donation was, however, far larger than other contributions to Sellner.

Sellner denies having anything to do with the Christchurch terror attacks.

The man alleged of committing the Christchurch terror attacks travelled to Austria among other European states last year.