Former CFMEU boss John Setka has been arrested and charged over allegedly threatening and harassing emails sent to a union administrator.

Victoria Police and AFP officers arrested the high-profile former union figure at his home in Footscray around 6.40am today.

He has been interviewed and charged with seven counts of using a device to menace, harass and offend.

Detectives seized a mobile phone and an iPad.

Police will allege Setka sent several allegedly threatening, offensive and abusive emails to a CFMEU administrator following a notice to produce document sent on October 27 and a follow-up letter sent on October 28.

Setka has been bailed to appear at Melbourne Magistrates' Court on January 30.

The charges were laid following an investigation by Taskforce Hawk, which was set up

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