A woman, 73, allegedly killed by her daughter at Redhead, in Lake Macquarie, on Saturday was an advocate and volunteer for mental-health services in the Hunter.

Gail Parnell was found dead inside her home at The Sanctuary mobile-home park on Kalaroo Road about 6.30pm, reports the Newcastle Herald. She had suffered multiple stab wounds in an alleged frenzied attack by her daughter, Keren Parnell, 36.

The Redhead house where a woman, 73, was stabbed to death. Credit:Newcastle Herald

Gail's husband, John Parnell, suffered minor injuries, including scratches and bruises to both arms, police said. He was taken to John Hunter Hospital but later discharged.

Keren Parnell, of New Lambton, was arrested at the home and later charged with murder, using an offensive weapon with intent to commit an indictable offence and detaining a person with intent to obtain an advantage and cause actual bodily harm.