Two women and two young children were killed in a house fire in north Derbyshire this morning, police have said.
A seven-year-old girl survived the blaze and was found outside the property with minor injuries consistent with smoke inhalation.
Chief inspector Rick Gooch from Derbyshire Police said it was a "tragic event" and specially trained officers are working with the affected family.
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Marjorie and Michael Cawdery, both 83, are understood to have been stabbed to death in a killing their family called "incomprehensible".
Detectives have launched a murder investigation following the shooting in Brent, north west London on Friday night.
Hot and humid throughout the Bank Holiday Weekend.