Police are to investigate an incident in which a man was bitten by a police dog as he was being arrested.
Footage has emerged of the shirtless man apparently being bitten in the neck in the incident in Weston-super-Mare, Somerset.
The man is lying on his front in the road when the barking dog, which is on a lead, lunges forward and appears to sink its teeth into his neck, dragging him forward a short way.
Assistant Chief Constable Louisa Rolfe of Avon and Somerset Police said: "Police were called to the Regent Street area of Weston-super-Mare in the early hours of Saturday morning to reports of a large fight involving a number of people. During this incident, a man was bitten by a police dog as he was being arrested.
"We are aware of a YouTube clip and comments on social media channels about this incident. The incident has been referred to our professional standards department for thorough investigation as we are keen to understand what happened. The YouTube clip is only a few seconds long and doesn't show events before or after the arrest.
"As this is a live investigation, it would be wrong to comment further.
"We are appealing for anyone who saw this incident to call our professional standards department via the 24-hour police enquiry centre on 101."