Police have confirmed the names of a mother and son found dead at a house in Bolton-le-Sands as 41-year-old Lisa Clay and her six-year-old boy Joseph Chadwick.
A post-mortem examination carried out last night revealed that they both died from multiple stab wounds.
The investigation continues and a 34-year-old man remains in a serious condition at the Royal Preston Hospital. He is under arrest on suspicion of murder.
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