Cogta MEC Nomusa Dube-Ncube said the protest outside their offices was an example of destructive behaviour.
"We have always maintained that public concerns should be addressed through the appropriate channels and never through violent protests that often result in the destruction of public property," she said, adding that staff felt intimidated by the violent attack.
"We urge the law enforcement agencies to investigate this incident without delay. We will also consider additional security measures for our building, where access is already controlled,” she added.
In November 2018, the same building was robbed by a group of armed gunmen, who stole several television screens and computers. The gunmen also allegedly hijacked an employee’s vehicle, which was later recovered in Newlands.