A man is being questioned today on suspicion of starting a fire which killed a 73-year-old woman, police said.
Northamptonshire Police said the 55-year-old man was detained near Brighton yesterday morning on suspicion of murder.
The woman died in a blaze at a terraced house in Washington Street, Kingsthorpe, Northampton, at around 3.50am yesterday.
Fire crews rescued a man and a woman from the house.
A police spokesman said officers from Northamptonshire travelled to Sussex yesterday to interview the suspect.
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