Several looters have been arrested in Vosloorus.
Rubber bullets were fired earlier to try and push the looters back.
At least six people have been killed in Gauteng in recent days.
President Cyril Ramaphosa on Monday authorised the deployment of the defence force in support of police operations in Gauteng and KwaZulu-Natal.
The president says action will be taken against those who loot and continue with violence and intimidation.
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