Forensic teams have been searching an area of Wisbech after an 86 year old woman was murdered in her home.
Una Crown's body was found at her bungalow on Sunday morning.
Detectives were originally unsure how she died but a post mortem has now revealed that she'd been assaulted.
Officers are appealing for anyone with information about the attack to contact them.
A man has been arrested after a pensioner was found stabbed to death and set alight in Wisbech, Cambridgeshire.
Detectives investigating the murder of Wisbech pensioner Una Crown have recovered a knife
An 86 year old woman has been killed in her own home. Una Crown's body was discovered at her bungalow in Wisbech at the weekend.