A man in his 20s has been arrested on suspicion of murder over the death of an elderly dog walker.
Grandfather Peter Wrighton, 83, was attacked while out walking his dogs last week, suffering multiple stab wounds to his neck and head.
The retired BT engineer's body was found in woodland three miles from the village of East Harling in Norfolk.
Mr Wrighton's last known sighting was in Kenninghall Post Office at 10:12am. He then drove his red Skoda 4.5 miles to The Street, close to the area where he walked his dogs.
His body was found by a passer-by at 10:46am.
Police on Saturday announced a young man from the local area has been detained in connection with the case.
Detective Superintendent Andy Smith, of Suffolk Police, revealed more than 220 people had been in touch to date.
He added search teams were using metal detectors and dogs to hunt for clues, and that more than 100 officers were working on the case.
:: Anyone with further information is asked to contact Norfolk Police on 0800 056 0944 or Crimestoppers on 0800 555 111.