Warrior princess guard dog stops vandal

A guard dog has detained a vandal who allegedly smashed up cars and threatened security at the Adelaide Convention Centre.

The 23-year-old man was caught early on Thursday morning after smashing car windows and consoles, police allege.

He threatened security guards with a pole but guard dog Xena, who fittingly shares a name with the famous warrior princess, snarled the man into submission and helped detain him until police arrived.

The man has been charged with aggravated assault, property damage and illegal interference.