An unidentified man stormed into a Malaysian high school and stabbed four students with a knife before running away, news reports said Friday.
The assailant, who wore a motorcycle crash helmet, entered the school at noon local time on Thursday and stabbed a student in the arm and thigh, district police chief Mohamad Mat Yusop said.
The suspect then walked out of the school and slashed three more students who were waiting to go home, Yusop was quoted as saying by the Star daily.
The man then ran off before school authorities arrived to help the victims, all boys aged 14 and 15, dpa reported.
The first victim suffered serious wounds, while the other three had only minor injuries, the report said. All of the schoolboys were sent to a nearby hospital for treatment.
Police said the attack was believed to be linked to a gang fight between two groups of students in the school, adding that a search has been launched for the assailant.