WA man in custody over woman's death

A 47-year-old man is in custody after a woman died at a home, south of Perth.

Police were called to the North Dandalup property at 2am on Thursday after reports of a seriously injured woman.

Despite efforts to keep the 50-year-old alive, she died.

The man, who is known to the woman, is assisting police with their investigation.

Anyone with information is asked to call Crime Stoppers on 1800 333 000.