A woman died in hospital on Friday 7th June, a week after being bitten by a dog in the north of England, Lancashire police have said.
Sharon Jennings, 55, had been walking on the old railway lines in Brookfield, Preston, on 31 May when her own dog began to fight with another dog.
Police say she was bitten on the hand and neck after intervening.
They say she was found unwell at her home on 3 June and taken to Royal Preston Hospital, where she died four days later.
A 49-year-old man from Preston was arrested on suspicion of offences under the Dangerous Dogs Act.