Moment knifeman casually walks into café and randomly stabs diner who fights back by punching him in the head - as police arrest man in his 50s over 'double stabbing'

A man in his 50s was arrested after a knifeman casually entered a café, randomly stabbed a diner, and was confronted by the victim who punched him in the head. The incident, described as a 'double stabbing,' involved police intervention following the violent attack.