Police have confirmed three toddlers, their mother and their grandmother were the victims of a horrific mass killing in Perth's north.
Their bodies were discovered at the home on Coode Street in Bedford on Sunday after a man, aged in his 20s, went to a regional WA police station and told officers of the location.
Twin two-year-old girls, a three and a half-year-old girl, their mother and grandmother have been confirmed as deceased.
The man remains in custody.
No charges have been laid at this time.