A screengrab of the viral video showing a boy being beaten up in a school classroom. -- Pix: Jabatan Netizen Malaysia's Facebook page

PASIR MAS: Police have detained 12 students allegedly involved in assaulting a Form Three student at a school here last Sunday.

District police chief Assistant Commissioner Mohamad Roy Suhaimi Sarif said the students were detained between 5.30pm and 6.30pm yesterday, few hours after the victim’s father lodged a police report.

He said nine of the students were picked up from their school on the same day that the report was lodged at 2.30pm on Wednesday.

“Two others were detained at their houses and one surrendered at the police station. These students, aged between 15 and 17, have undergone urine tests and all were tested negative (for substance abuse),” said Mohamad Roy when contacted.

It was reported the 15-year-old victim with bruises on his face and body was beaten up in a classroom after the school sports activities at 6pm on Sunday. Those involved were believed to be fighting over a girl.

The incident was recorded and the video clip had gone viral on social media since.

Mohamad Roy said the case was being investigated under Section 147 of the Penal Code for rioting

“We are completing an investigation paper to be submitted to the deputy public prosecutor. Such an incident should not have happened, especially among students.”