Angry Buffalo City Metro workers burnt tyres in East London and King William's Town city centres on Tuesday over a wage dispute.
Police fired rubber bullets and stun grenades to disperse the crowd.
East London police spokesperson Warrant Officer Hazel Mqala said Oxford Street in the East London CBD was closed for an hour on Tuesday afternoon as burning tyres and rubbish blocked the road.
In King William's Town, traffic was temporarily disrupted on the busy Alexander Road as workers ran riot.
King William's Town police spokesperson Captain Siphokazi Mawisa said the situation subsided after the workers drove to East London to join other striking colleagues.
There were no arrests in either incidents...