The five people found dead at a house in Perth’s north-eastern suburbs were twin two-year-old girls, a three-and-a-half-year-old girl, their mother and grandmother, police have revealed.

The bodies of the girls and women were discovered at the home in Bedford yesterday after a man, believed to be aged in his 20s, went to a regional Western Australia police station.

The man remains in custody but “no charges have been laid at this time”, a police spokesman said.

The names of the victims have not yet been released.

The relationship of the victims to the man in custody is also yet to be confirmed.

Officers continued to work throughout the night at the house as part of their investigation in an effort to determine the circumstances around the killings.

Assistant Commissioner Steel said there were “no ongoing safety concerns” at the scene.