Port Phillip Crime Investigation Unit detectives have charged a man after allegedly making threats outside a St Kilda East school yesterday afternoon.
Officers were called to the Dandenong Road address following reports of a man with a backpack allegedly making the threats about 2.45pm.
A 45-year-old man was arrested on Westbury Street.
The Bomb Response Unit attended and assessed the backpack, with no suspicious devices located.
The nearby school was momentarily placed into lockdown as a precaution.
The man was charged with bomb hoax, trespass, unlawful assault, possess drugs and possess a controlled weapon.
He was bailed to appear before Melbourne Magistrates' Court on 16 September.
Investigators do not believe the incident was religiously or ideologically motivated.