A teenager accused of stabbing a fellow student at school has been granted bail after a court heard the alleged attack may have been sparked by a social media post targeting his family.

The 16-year-old faced Richlands Children’s Court in Brisbane, Queensland, on Wednesday, a day after the alleged stabbing left a 17-year-old boy in a life-threatening condition.

WATCH THE VIDEO ABOVE: Teen granted bail after Brisbane school stabbing

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Police allege the teenager took a knife to the school in Karawatha before stabbing the older student multiple times during an altercation about 11.45am.

The boy sustained life-threatening injuries and was treated at the scene before being rushed to Princess Alexandra Hospital for emergency surgery, where he remains in a stable condition.

Investigators examined the area where the alleged stabbing unfolded. Credit: 7NEWS

The court heard prosecutors allege the stabbing was an act of retaliation over a social media video involving the teenager’s family.

Defence lawyers told the court the 16-year-old had been subjected to harassment, intimidation and racist threats before the alleged attack.

Police allege he fled the scene and was located a short time later in a vehicle several kilometres away.

He has been charged with acts intended to maim, disfigure or disable and unlawful possession of a weapon.

Police remained at the school as students and parents waited for updates. Credit: 7NEWS

The teenager was granted bail on strict conditions, including a 24-hour curfew requiring him to remain at his home, and an order prohibiting him from attending or going near the school.

His parents were present in court to support him and the matter is due to return to court in September.

The alleged stabbing is the second at a Queensland school in as many days.

On Monday, a 15-year-old boy suffered abdominal injuries during an alleged stabbing at a Cairns high school. Another 15-year-old boy was later charged.

The latest incidents have renewed calls for young people to stop carrying knives and to install metal detectors at schools.

Brett Beasley, whose son Jack was fatally stabbed on the Gold Coast in 2019 and who now advocates through the Jack Beasley Foundation, said the latest incidents were heartbreaking.

“It’s just so sad every time we hear a stabbing, especially in a school,” he said.

“It’s just not on. These kids need to learn and understand that they can’t carry a knife or a weapon around because this is what happens, and they don’t realise, they’re too young to realise the consequences.”

Students and staff affected by Tuesday’s incident are being offered counselling.

The Jack Beasley Foundation is urging young people to think twice before carrying a knife after another alleged school stabbing. Credit: 7NEWS