JOHANNESBURG - Eighty-seven protesters have been arrested in the past 15 hours for public-violence-related offences.
They are said to have been participating in the National Shutdown.
The arrests have been made by the National Joint Operational and Intelligence Structure.
Over 24,000 tires have been confiscated by law enforcement agencies nationwide.
They're said to have been strategically placed for acts of criminality.
Law enforcement officers say they remain on high alert.