There are calls for better measures to protect children from domestic violence following the deaths of two young boys and a baby girl in a house fire in Sydney's west. A 28-year-old man remains under police guard in hospital after allegedly trying to prevent emergency services from rescuing the children trapped inside his burning home at Lalor Park. Four other children, aged 11 and under, and their mother are being treated for burns and smoke inhalation. Sean Tarek Goodwin reports from Lalor Park.