Dlamini told ANA the arrests were made during crime prevention operations in Hillbrow, Mayfair and downtown Johannesburg.
All those arrested were taken to Hillbrow police station to be processed. All those who could not be documented would be taken to the Lindela repatriation centre, Dlamini said.
The police were inter alia searching for drugs, illegal firearms and stolen property, but no other arrests were made, he said.
Government last week began deploying the army to help police contain a wave of xenophobic violence that spread from KwaZulu-Natal to Gauteng, claiming at least seven lives.