The man, from Roxburgh Park in Melbourne's outer-north, was arrested at Melbourne's international airport overnight. The Australian Federal Police say he had been part of a chat group with other men who were sharing violent extremist material, including graphic acts of violence such as beheadings, shootings and bombings.
"We allege this individual was part of a dedicated online network operating within Australia, motivated by sharing and distributing violent extremist material, including ISIS propaganda," said AFP commander Paula Hudson.
He faces charges of possessing violent extremist material, which carries a maximum penalty of five years in prison, and for refusing to grant access to electronic devices. He is expected to face court later today.
Commander Hudson said the arrest was a warning to those promoting dangerous content online. "Let me be extremely clear — this harmful content holds no place in our society," she said.
The 30-year-old is the sixth Victorian man in recent months to be charged by the AFP's National Security Investigations team.