By Renju JoseSYDNEY, June 25 (Reuters) - Australia faces multi-faceted threats from autocratic regimes, hackers and antisemitic extremists that present a systemic challenge to national security and are degrading the security environment, the country's spy chief said.While Australia's terrorism threat level remains at "probable", Australian Security Intelligence Organisation (ASIO) Director-General Mike Burgess said the designation does not accurately capture the "concurrent, cascading and compounding threats."

The former Australian resident is now imprisoned in Iraq, as ASIO warns terrorism threats are becoming harder to predict.

Mike Burgess said he fears a shadowy Iranian-linked group that has attacked Jewish sites in Europe could start terrorising Australians.