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Public works and transport department spokesperson Jandre Bakker said that the officer had been rushed to hospital.
"One of the suspects has been apprehended, two are still at large," said Bakker.
Makoba-Somdaka added that two other officers had also been taken to hospital for shock.
It is alleged that the officer's pistol was recovered from the arrested suspect.
News24 has requested comment from Western Cape police. It will be added once received.