A 47-year-old man has been charged with three counts of murder after police discovered the bodies of a 46-year-old woman and her two sons, aged four and 12, inside a home in Campbelltown in south-western Sydney. NSW Police Force said officers responded to a triple-zero emergency call just before 8:00pm on Monday and found what investigators described as a particularly violent scene. The man was arrested at the residence and remains in custody. Detectives from the homicide squad are continuing to investigate the circumstances surrounding the deaths, which are being treated as a domestic and family violence incident.