
The victim was stabbed in the back and shoulder and is being treated in hospital. Police said the alleged attacker, also 15, had been absent from the school in Banting for several months while undergoing medical treatment.
Kuala Langat district police chief Superintendent Mohd Akmalrizal Radzi confirmed the incident had taken place and said an official statement would follow shortly.
According to sources, the suspect entered the school through the main gate shortly before the attack, wearing a black T-shirt and red chequered trousers.
How the assault unfolded remains unclear and investigators have not yet established a motive.
Teachers reportedly restrained and calmed the suspect before alerting police. Officers arrived and detained the student, recovering a knife believed to have been used in the attack.

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