Man armed with knife goes on wild crime spree in Brisbane's north stealing two cars A MAN went on a violent spree including stealing a woman's car at knifepoint in Brisbane's northern suburbs yesterday. It began when a man stole a black Mercedes from a car yard on Gympie Road at Kedron about 10.15am. A short time later the car was involved in a hit-and-run with another car on Kuran Street in Chermside. The man then abandoned the Mercedes in Northgate and used a large knife to threaten a man, 64, and demanded his car keys. A male motorist, 63, stopped to assist and was involved in a scuffle with the man, leaving the motorist with minor injuries. The man then took off, leaving behind a hooded jumper, beanie, mobile phone and a knife sheath. He fled on foot to a home in Northgate where he broke in by smashing through a screen door. He demanded the car keys from a woman, 75, inside the home. When a 37-year-old woman tried to stop him he grabbed her from behind and held a knife to her throat. The 75-year-old surrendered her car keys and he fled in her yellow Mitsubishi sedan. As he left the car ran into a fence, damaging the rear. The two women were not injured in the attack. The man is described as Caucasian in appearance, about 23-years-old, 175cm tall with short brown hair and was wearing a dark T-shirt and knee-length khaki shorts. The Mitsubishi sedan has registration number MUM59. Police are appealing for any information relating to the whereabouts of the yellow Mitsubishi and are warning the public not to attempt to approach the man for safety reasons.