Police said a small group of protesters had gathered where the attack occurred.
Several journalists working for South Africa's public broadcaster SABC TV have been attacked while covering opposition protests in Cape Town.
The incident happened in the early hours of Monday in Nyanga town.
The crew was filming visuals of the protests when two men allegedly approached their vehicle and hit the car with an object.
One of the journalists has been hospitalised with head injuries, local media said.
Police said a small group of protesters had gathered where the attack occurred.
The SABC crew has described the incident as traumatic.
The Economic Freedom Fighters (EFF) party is calling for the resignation of President Cyril Ramaphosa and an end to the energy crisis in the country.
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