A tragic incident unfolded north-west of Adelaide, where a woman lost her life after being attacked by her dog inside her home.

Identified as 39-year-old Chrissy, the woman suffered a fatal mauling by her dog, Dexter, on Murphy Crescent in Whyalla Stuart yesterday afternoon, shortly after 4 PM.

Despite the efforts of paramedics who arrived on the scene, they were unable to save her.

“There were two ambulances parked down the side of the street,” recounted neighbor Amy Heath.

“We were instructed to remain inside our homes and not to communicate with anyone else in the vicinity,” she added.

The dog, a bulldog-staffy cross, was subsequently removed by Whyalla City Council officials and was humanely euthanized.

Neighbours have told 9News Dexter had attacked Chrissy before.

Mayor Phil Stone called the attack “a big tragedy”.

“I can’t remember the last time something like this has happened in our city,” Stone said.

“Over the years experts have said no matter how close you are to a pet, how friendly they are, any dog can have a bad day.”

Government workers visited the home and Chrissy’s partner today.

Support will also be made available to others affected by the horrific loss.

Police are preparing a report for the coroner and working to understand what happened.

They don’t believe there was any human involvement in the attack.