
The child victims were aged "around four and one", a police spokeswoman said, adding that the gruesome discovery was made at a house just outside the village of Pioz, around 60 kilometres (40 miles) northeast of the Spanish capital.
1 dead, 14 hurt in blast at Spain apartment block
All four victims were members of the same family, local mayor Ricardo Garcia Lopez told AFP.
The mayor added that, according to neighbours, the family were renting the house and were not Spanish nationals, but Latin Americans.
The alert was sounded in the morning by one neighbour who smelt a strange odour emanating from the house, police said.
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