A teenage girl has died in hospital a week after a horrifying dog attack in NSW.

NSW Police said emergency services were called to a home on Broughton Street, Singleton, about 11.30am last Thursday.

They found a 17-year-old girl with critical injuries to her head, neck and body. She has been named by News Corp and the Nine papers as Annalyse Blyton.

She had reportedly gone to the house to study with a friend when the dog attacked her in the front yard.

“Police were told the girl was at a friend’s home when the incident occurred,” they said on Tuesday.

“The 10-year-old dog – described as a large dog of mixed breed – lived at the home.”

The dog was reportedly a mix of boxer, bull Arab and Irish wolfhound.

Passersby who saw the attack stepped in to help Annalyse, fighting to get the dog off her. They also provided basic first aid until emergency services arrived.

Annalyse was treated at the scene by NSW Ambulance paramedics before being flown to John Hunter Hospital in a critical condition.

She died in hospital on Monday.

“Emergency services were confronted with quite a confronting scene,” NSW Police Acting Superintendent Justin Cornes said last Friday.

“It should be noted that the dog was actually in a fenced yard at the time. This didn’t occur in the street.”

He also praised those who had rushed to the teenager’s aid, despite the vicious nature of the dog’s attack.

“Without the quick actions of the bystanders, this incident could have been much, much worse,” he said.

“Running into a scene where they didn’t know the full circumstances and to jump in there and remove the dog, it’s an incredible act.”

Police said the dog had since been euthanised, with the consent of its owners.

Investigations continue and a report will be prepared for the coroner.

A GoFundMe for Annalyse’s family had raised more than $14,000 of a $20,000 target by early Tuesday.

Recently released data from iSelect revealed that 10,345 Australians were hospitalised after being bitten or struck by a dog in 2023-24.

It found dogs made up 31 per cent of all animal-related injuries – well ahead of other animal-related injuries such as from sharks, snakes and spiders.