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Police in a statement said the arrests follow an alleged armed robbery at the Cathedral Range State Park in Taggerty, the state s north-east, last Saturday.
Investigators allege a group of men smashed a car window and threatened the passengers inside with a knife, before making off with their mobile phones.
No charges have been laid and the investigation remains ongoing, police said.
Mr Sewell had been on bail after being charged over a separate alleged violent attack on a security guard at Channel 9 s Melbourne headquarters in March.
The man allegedly punched the security guard multiple times outside the television network s headquarters in Docklands.