The Ekhurhuleni Municipality on Monday said security teams have now been assigned to protect contract staff hired to collect rubbish.
Municipal workers downed tools four weeks ago after seven shop stewards were fired for allegedly assaulting a presiding officer during a disciplinary hearing.
Last week, the municipality hired private teams to clear the mountains of garbage that have accumulated in Kempton Park, Edenvale and Springs but two contract workers were attacked.
Meanwhile, 22 South African Municipal Workers’ Union (Samwu) workers were arrested on Monday for assaulting policemen during an illegal demonstration.
The municipality’s Zweli Dlamini said by resorting to violence, the protestors are doing themselves more harm.
“There is no room for people to vandalise property and for people to intimidate other workers in the name of striking, that is a clear crime and we are going to act swiftly when it comes to that,” said Dlamini.