Transit Crime Investigation Unit detectives charged three teenage boys following an alleged attempted armed robbery and an armed robbery at train stations in Melbourne's south this morning.
It is alleged the males were at the Southland train station when they attempted to rob a female, about 8am.
It's believed they then caught another train from Cheltenham to Mentone where the males allegedly produced a knife and made demands for property from a 14-year-old male.
The group fled the scene and were arrested nearby.
No one was physically injured during the incidents.
A 13-year-old Ringwood boy has been cautioned and a14-year-old Dandenong boy is expected to be charged on summons with armed robbery and attempted robbery at a later date.
A 17-year-old Elwood boy has been exonerated and released pending further enquiries.
