Police are advising fanatical football fans in Sarawak to keep their emotions in check.
Sarawak police commissioner Datuk Acryl Sani Abdullah Sani said it was okay to be supportive of their favourite teams but violence was a no no.
"The case of fans turning violent recently is something rare in Sarawak and it is an isolated incident," he told reporters on the sidelines of Bukit Aman director of management Datuk Mortadza Nazerene's visit to Sarawak Energy Berhad's office here Friday.
He added that following the violence that happened at Stadium Negeri Petra Jaya here on April 7, police would beef up their presence at stadiums and also enlist the help of the General Operations Fore and People's Volunteer Corps.
L/Cpl Amzari Othman, 33, was injured in the lips after fans turned unruly and attacked policemen at the stadium that day.