Two Ekurhuleni metro police officers were seriously wounded, said SA Police Service spokeswoman Lt-Col Katlego Mogale.
“It was an attempted robbery. Police were following up on information when the incident took place at 11.40am,” she said.
“Four people were shot dead. One is a police officer and the other three are suspects.”
Four alleged robbers were arrested, and the metro police officers were in a critical condition in hospital.
The men were attempting to rob a scrap metal company, said Mogale.
Police were investigating.