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23 January 2013, 11:18 | Updated: 23 January 2013, 16:21
Detectives investigating the murder of a Wisbech pensioner are putting up posters advertising a £10,000 reward for information.
The body of 86 year old widow Una Clark was discovered in her bungalow on Magazine Lane on Sunday 13 January.
Tests found she had been stabbed to death and then set on fire.
Police believe Mrs Crown's may have been set on fire in an attempt to conceal her injuries and destroy any evidence.
A knife was later found by detectives close to her home, and tests are being done to establish whether it is linked to her murder.
Mrs Crown was last seen on the morning of Friday 11 January, and spoke to a friend on the phone at around 5pm the following day.
The charity Crimestoppers yesterday (Tuesday) announced it is putting up a £10,000 reward for information leading to the arrest and conviction of whoever is responsible for the murder.
Police are now putting up posters in the area around Magazine Lane publicising the reward, and handing out leaflets containing the information.
Detective Chief Inspector Jon Hutchinson said: "We hope the reward will motivate someone to come forward with that crucial piece of information we need."
Anyone with any information is asked to call the Major Crime Unit on 101 or Crimestoppers, anonymously, on 0800 555111.
The £10,000 reward can only be claimed by those who provide information to Crimestoppers directly on 0800 555 111 which leads to the arrest and conviction of those responsible for Mrs Crown's murder.
Anyone involved in the murder will not be eligible to claim any of the reward.