Teen joyrides in Melbourne tram

A teenager who was obsessed with trams took unwitting passengers on a joyride through Melbourne after stealing the vehicle on Sunday night.

Police finally stopped the tram after it had travelled about 30km by cutting its electricity. The tram was undamaged and none of the passengers were injured.

Detective Senior Constable Barry Hills said the 15-year-old drove the vehicle out of a tram depot after stealing keys for it from another depot three weeks ago.

 "He's a nice lad, he's a good lad - I think his obsession just got the better of him."

The youth has been charged with nine offences and will appear in a children's court on June 20.