Australia’s social cohesion is eroding, according to a sobering intelligence assessment that also warned of growing foreign interference and espionage.

Australia’s spy chief Mike Burgess has revealed that almost all foiled terrorist attacks over the past year involved the radicalization of children, while adding that the range of threats to national security is increasing exponentially.

The head of Australia's domestic intelligence agency ASIO has warned that the country will face greater threats from espionage, foreign interference and potentially sabotage over the next five years.

He warned that multiple countries were "relentlessly seeking information" about Australia's military capabilities