A man has been arrested over the murder of an 86-year-old pensioner who was stabbed to death and set alight in her own home 11 years ago.

The body of Una Crown, a retired postmistress, was found in the hallway of her Wisbech bungalow by a family member on the morning of January 13, 2013.

Despite numerous appeals by police and a number of arrests, it remains one of the region's most notorious unsolved killings.

But today Cambridgeshire police said a 69-year-old man had been arrested on suspicion of the murder and was being questioned by detectives.

Eastern Daily Press: A police officer outside Una Crown's bungalow on Magazine Lane, WisbechA police officer outside Una Crown's bungalow on Magazine Lane, Wisbech (Image: Ian Burt)

Mrs Crown was found lying face-downwards in the hallway of her neat bungalow, on Magazine Lane in a pool of blood.

But the first officers who attended the scene decided she had accidentally set herself alight while using her cooker and that gashes to her neck had been caused by a scarf she had been wearing as she fell.

READ MORE: How trail for Una's killer ran cold

READ MORE: Fresh appeal over unsolved murder

Two days later, a post-mortem revealed she had been repeatedly stabbed before being set on fire, while hand injuries revealed she had struggled with her attacker.

Eastern Daily Press: Una Crown was brutally stabbed in her bungalow before her body was set alightUna Crown was brutally stabbed in her bungalow before her body was set alight (Image: Submitted)

A murder investigation was launched. But by then the floor had been mopped to clean up muddy footprints - some of which could have been left by the killer.

As police faced criticism for their handling of the case a number of appeals for witnesses and a re-enactment by BBC's Crimewatch brought in fresh information and leads in 2014.

It threw up new information, which resulted in the arrests of two men, aged 33 and 40, but neither was ever charged, along with a 44-year-old man arrested in January 2015 and a 58-year-old who was arrested a month after the murder.

Eastern Daily Press: A police flyer offering a £10,000 reward for information leading to the conviction of Una Crown's killerA police flyer offering a £10,000 reward for information leading to the conviction of Una Crown's killer (Image: Ian Burt)

In the run-up to the 10th anniversary of the murder, Cambridgeshire police said no undetected case was ever closed and it would continue to regularly review it and pursue any lines of inquiry which may come to light.