The police had carried out raids in the Johannesburg city centre in a bid to clamp down on trading in illegal goods and illegal business operations.
Cele said the SAPS would remain undeterred in its resolve to tackle illegal economic activities and those who sought to undermine the country's laws. He said this week's violence had nothing to do with the operation last month, in which the police themselves had been attacked by foreign nationals.
"We did not raid the people that are innocent .... We were raiding the criminals and for that we're not apologising and for that we're repeating again: we'll raid them time and again until they keep to the law and make sure that the law of the republic is kept."