Some postal service workers embarked on an illegal strike on Monday, said the SA Post Office (Sapo).
The strikers were employed in the mail sorting centres, said spokesman Christopher Hlekane.
“Early indications are that some operations, including mail and retail, are being disrupted by the work stoppages,” he said.
It was not clear how many workers were on strike.
Hlekane said Sapo management was trying to resolve the workers' issues.
“Sapo advises that the principle of no-work, no-pay will apply. The organisation will also deal with any incidents of intimidation accordingly,” he said. - Sapa