Police have said a pensioner who was found murdered in her bungalow had been repeatedly stabbed and then set on fire.
The body of widow Una Crown, 86, was discovered on the floor in her bungalow in Magazine Lane, Wisbech, Cambridgeshire, shortly after 11am on Sunday.
A post-mortem examination revealed she had been "brutally" assaulted.
Forensic examinations were today continuing at the bungalow and a full investigation has been launched.
Detective Chief Inspector Jon Hutchinson, said: "This was a horrific murder of a defenceless elderly woman in her own home. She was stabbed several times then set on fire in an apparent attempt by her killer to hide her injuries and destroy evidence."