KUALA LUMPUR, July 21 -- A teenage boy suffered serious injuries after he was allegedly assaulted by a group of individuals at a residence in Cheras here on July 5.

Cheras district police chief ACP Mohd Rosdi Daud said police detected the circulation of a video recording of the incident on WhatsApp, Sinar Harian reported today.

"We received a report from the victim's mother at 12.45am on July 5 regarding the incident.

"A team from the Cheras district police headquarters' Criminal Investigation Division subsequently arrested four local male teenagers, aged 14, to assist investigations," he said in a statement today.

Mohd Rosdi said police also seized a mobile phone belonging to one of the suspects, believed to have been used to record ...