The 39-year-old victim lost three fingers and had his left arm almost severed after arguing with two men about their dogs not being on leads.

He was attacked in Shepherds Bush, west London, on Tuesday night.

The Metropolitan Police, who are treating the incident as attempted murder, said a 23-year-old man arrested on Saturday had been bailed until May.

The injured man got into a row when two dogs started biting at his ankles.

He was pursued, the dogs were set on him and he was slashed with a meat cleaver.

The man managed get into the garden of a house and raise the alarm by banging on a window.