Four people, including two children, found dead in Perth in suspected murder-suicide

WA police say both Mosman Park children had significant health challenges' and had been in contact with care services

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Two parents and their teenage children have been found dead in the affluent Perth suburb of Mosman Park in a suspected murder-suicide, Western Australian police say.

At 8.15am on Friday, emergency services received a distressed call from a person known to the family who had gone to the home on Mott Close, in the city's south-west.