The 67-year-old, who wished to remain anonymous, told The Canberra Times she was walking her 11-year-old dog, Evie, in Narrabundah on November 14 just after 4pm when a "huge white dog" appeared out of nowhere.

"I was walking Evie and there was nobody around and suddenly this dog appeared and grabbed Evie by the neck," she said.

"It attacked her viciously and I was completely defenceless...I was on my own.

"I was screaming and so was my dog. Within a minute, the owner appeared and grabbed his dog."

She said once the white dog, which she believed to be a Bull Arab, let Evie go she picked her up and rushed her to the vet.

"Evie was semi-conscious and bleeding profusely from a huge gash on her side.

"I just left without even speaking to the owner of the dog that attacked her because I had to get her to the vet, but it's something that I regret, not talking to the owner."

Evie was stabilised overnight but the next morning died of her injuries.

The woman said she had reported the incident to police and rangers who had referred her to the ACT domestic animal service. The Canberra Times approached domestic animal services for confirmation of the death and for comment on Friday but to date authorities have said nothing.

She is urging anyone who can help find the dog that attacked Evie to come forward. She said the white dog was not wearing a collar at the time but she believed the dog was named Angel.

The incident comes after a woman was killed by her own dog in her Canberra home in October. A service dog named Oreo was attacked by an Alaskan malamute in Narrabundah in September.

The US embassy has been linked to three separate dog attacks in the past 18 months, but investigations have been hampered by diplomatic considerations.

Last month, a Transport Canberra and City Services spokesman said there had been 389 reported dog attacks in the territory during the 2016-17 financial year. Of that, 14 dogs had been declared dangerous.

Dog attacks in Canberra this year

Follow Han Nguyen on Facebook and Twitter.