Police are appealing for information following a stabbing at a fast-food restaurant in Paringa Drive, Meadow Heights about 8pm on 14 July.
Investigators understand an 18-year-old man was sitting in the outdoor area when a group of youths approached the victim and a fight occurred.
During the fight, the 18-year-old was stabbed in the stomach three times.
The offenders then ran off and got into a silver-coloured Nissan Navara last seen mounting the median strip heading north on Hudson Circuit.
The victim was taken to hospital in a stable condition.