The incident happened at 11.30pm on Thursday, said Captain Stephen Marais.
The woman was walking on a road behind some friends when she was attacked.
“At this point in time, it cannot be confirmed how many dogs attacked her as there were two full grown and two small pitbulls in the yard,” he said.
The 45-year-old woman was declared dead on the scene.
The Society for the Prevention of Cruelty to Animals (SPCA) was called in to remove the dogs.
Police have opened an inquest docket.