PERTH, Australia — The Western Australia police on Saturday identified seven people, including four children, who were found dead from gunshot wounds the day before in what was the country’s worst mass shooting in more than 20 years.

The police were called just after 5 a.m. on Friday to a modest home in Osmington, a village near the tourist town of Margaret River, 170 miles south of Perth. There, in the main house and a converted shed, they discovered the victims, who the police identified on Saturday as Cynda and Peter Miles; their daughter, Katrina Miles; and her four children, two boys and two girls, aged 8 to 13.

Western Australia Police Commissioner Chris Dawson said at a news conference in Margaret River on Saturday that the police were not searching for suspects. Six members of the family were victims of homicide, he said, but not the seventh, suggesting that the police saw the case as a murder-suicide.

He added that three rifles licensed to Mr. Miles were found at the property.

“Police are still some way from completing our investigation,” Commissioner Dawson said, declining to provide more details about whether an emergency call came from Mr. Miles, who is believed to have shot his family members before calling the police and then taking his own life. “The examination of the crime scene will still take several days.”