Westgate Divisional Response Unit detectives charged seven boys following an alleged series of aggravated burglaries at 24-hour gym facilities in Melbourne's west.
It is alleged 14 incidents involved offenders using stolen gym passes and following gym members into gyms on Hummingbird Boulevard Tarneit, Derrimut Road Tarneit and Old Geelong Road in Hoppers Crossing between 12 September and 4 November.
Once inside the offenders allegedly stole personal property, including car keys, headphones and wallets from members gym bags.
Investigators executed search warrants at addresses in Truganina, Wyndham Vale and Tarneit and seized stolen keys, a stolen car and gym passes.
Two boys aged 14 and 15 from the Wyndham area have both been charged and remanded with five counts of aggravated burglary and five counts of theft of motor vehicle.
A 15-year-old boy from the Wyndham area has been charged and bailed with eight counts of aggravated burglary and eight counts of theft from motor vehicle.
A 14-year-old boy from the Wyndham area has been charged and bailed with four counts of aggravated burglary and four counts of theft of motor vehicle.
A 13-year-old boy is expected to be charged on summons with two counts of aggravated burglary and two counts of theft of motor vehicle.
They will all appear at a children's court at a later date.
Two boys aged 15 and 12 received a formal caution.
