Dramatic footage shows knife-wielding man stamping a fellow diner after a brawl broke out inside a McDonald's.
The clip, recorded in Gravesend, Kent, shows furniture being hurled around as the man, dressed in a grey hoodie, attacks someone on the ground.
Other customers beg for him to stop as he picks up the knife from the ground, but the video cuts out before it is used.
Kent Police are still hunting for two black males in connection with a stabbing at around 3.45am on July 16.
'One is believed to be aged between 16 and 20 years old, around 5ft 8, medium build and wearing black tracksuit bottoms with a grey tracksuit top with the hood up.
'The second suspect is believed to have been wearing dark grey tracksuit bottoms with a dark top and is described as having short hair.'
A McDonald's spokesman said: "We can confirm an incident occurred at our Gravesend restaurant in the early hours of Sunday morning.
"This incident is subject to an ongoing police investigation and we're unable to comment further."
Anyone with information should call Kent Police 01634 792209, quoting crime reference number 16-0255.