"Most of the protesters are Nehawu members‚ including nurses‚ cleaners and porters‚ but some outsiders have been involved as well‚" he added.
Bloom said he had visited the hospital on Thursday.
"Staff told me that rampaging workers had gone through the wards‚ intimidating them and disrupting activities. Many operations have been cancelled because of a lack of clean linen‚" he said.
"Their grievances may be valid‚ but trashing a hospital and endangering the safety of patients should not be allowed under any circumstances."
Last week‚ TimesLIVE spoke to Gracia Rikhotso‚ Nehawu Gauteng deputy secretary. She said the hospital's management and provincial health department were not willing to speak to them. “Workers are angry and feel they are being taken for granted. They put in the work but when it comes to payment there is none‚” Rikhotso said.