Bloemfontein - Six armed men attacked and assaulted a Free State farmer near Warden and stole an undisclosed amount of money on Friday, police said.
Sergeant Mmako Mophiring said six men overpowered the farmer at the farm Skaapskraal at about 11:45.
"Steve Minnaar, 70, his wife and some workers were tied up with cables and ties."
Mophiring said the men assaulted the victims and stole a firearm.
The robbers escaped in a vehicle belonging to a friend of the farmer.
"They later stole a Corsa vehicle which was left in Warden," said Mophiring.
Minnaar and his wife were taken to a private doctor for medical attention.
Mophiring said police were investigating a case of armed robbery and anyone with information about the incident could contact their nearest police station.