A mum who stabbed, strangled and suffocated her three children before burning their bodies in a house fire has been sentenced to life.
Margaret Dale Hawke killed her 10-year-old daughter, seven-year-old son and four-month-old son at their home in July last year.
The 36-year-old pleaded guilty to three counts of murder in the family's Port Hedland home and has been given a minimum non-parole period of 25 years by the Supreme Court in Perth, Australia.