Brigadier Thulani Ngubune said the woman was affiliated to the National Union of Mineworkers (NUM).
“According to police reports, the complainant, a 39-year-old woman, and her family members were asleep at home when they heard strange noises in the yard,” said Ngubane.
“Her partner woke up and went outside to investigate. The victim’s partner discovered that the family’s vehicle, a grey Ford Focus vehicle, had been set alight and was up in flames. The estimated value of the damage is R70,000.”
Police were investigating whether the fire could be linked to the strike by mineworkers affiliated to the Association of Mineworkers and Construction Union (Amcu).
Labour Minister Mildred Oliphant on Wednesday condemned the reports of intimidation and violence.
She said while workers who had gone on strike were exercising their right, they should also respect the right of other workers who did not want to be part of the strike.
“Violence and intimidation cannot be condoned and law enforcement should take the necessary steps to protect lives and property,” said Oliphant.
At the weekend, a 26-year-old Amcu protester was arrested after he allegedly damaged the car of an Impala Mineral Processes plant employee using a knobkerrie.
The man, who is an Amcu shop steward, was on bail on a separate case of attempted murder, said Ngubane.
On Tuesday, police used rubber bullets and stun grenades to disperse striking mineworkers carrying traditional weapons.
The strikers, who had blocked the road leading to Anglo American Platinum’s Khuseleka 1 shaft, threw stones at police.
They wanted to remove non-striking workers from the shaft. Ngubane said two people were arrested. No one was injured.
The platinum sector has been crippled by the Amcu strike. The union is demanding a R12,500 basic salary for miners.
Around 80,000 miners have downed tools as negotiations continue between the union and employers.
The Commission for Conciliation, Mediation, and Arbitration was facilitating the talks.